Document:

<PAGE>

                                                                   EXHIBIT 10.36

               FIRST AMENDMENT TO RECEIVABLES PURCHASE AGREEMENT

     This FIRST AMENDMENT (this "Amendment"), dated as of September 29, 1999,
                                 ---------
is to the Receivables Purchase Agreement, dated as of June 25, 1999 (the
"Agreement"), among CGSF FUNDING CORPORATION, a Delaware corporation, as
 ---------
seller (the "Seller"), McKESSON HBOC, INC., a Delaware corporation ("McKesson"),
             ------
as the initial servicer (the Servicer together with the Seller, the "Seller
                                                                     ------
Parties" and each a "Seller Party") the funding entities parties thereto
-------              ------------
(together with their respective successors and assigns, the "Financial
                                                             ---------
Institutions"), Preferred Receivables Funding Corporation ("PREFCO"), Falcon
------------
Asset Securitization Corporation ("Falcon"), and Blue Ridge Asset Funding
Corporation ("Blue Ridge"; PREFCO, Falcon and Blue Ridge being referred to
collectively as the "Conduits", and together with the Financial Institutions,
                     --------
the "Purchasers"), Bank One, NA (formerly known as The First National Bank of
     ----------
Chicago), and Wachovia Bank, N.A. (each a "Managing Agent" and collectively, the
                                           --------------
"Managing Agents") and Bank One, NA (formerly known as The First National Bank
 ---------------
of Chicago), as collateral agent for the Purchasers hereunder or any successor
collateral agent hereunder (together with its successors and assigns hereunder,
the "Collateral Agent"). Capitalized terms used, and not otherwise defined,
     ----------------
herein shall have the meanings assigned to them in the Agreement.

     WHEREAS, the Seller Parties, the Purchasers, the Managing Agents and the
Collateral Agent (collectively, the "Parties") have entered into the Agreement;
and

     WHEREAS, the Parties desire to amend the Agreement in certain respects as
hereinafter set forth;

     NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration (the receipt and sufficiency of which are hereby
acknowledged), the Parties hereto agree as follows:

     SECTION 1 AMENDMENTS
               ----------

     (a)  The definition of "Defaulted Receivable" in Exhibit I to the Agreement
                                                      ---------
          is amended by deleting the words "(ii) as to which the Obligor
          thereof, if a natural person, is deceased," and by changing the
          reference to "(iii)" to "(ii)", by changing the reference to "(iv)" to
          "(iii)" and by changing the reference to "(v)" to "(iv)".

     (b)  Clause (i)(a) of the definition of "Eligible Receivable" in Exhibit I
                                                                      ---------
          to the Agreement is hereby deleted in its entirety and the following
          language is substituted therefor:

          "(a) if a corporation or other business organization, including any
          sole proprietorship, is organized under the laws of the United States
          or any political subdivision thereof and has its chief executive
          office in the United States; provided, however, that nothing contained
                                       --------  -------
          herein shall preclude any natural person from providing a personal
          guarantee in favor
<PAGE>

          of a corporation or other business organization, including any sole
          proprietorship, with respect to any Receivable;"

     (c)  Section 8.5 of the Agreement is amended by replacing "on the fifteenth
          (15/th/) day of each month and at such more" with "on the fifteenth
          (15/th/) day of each month, or if such day is not a Business day, the
          next Business Day, and at such more".

     SECTION 2 REPRESENTATIONS AND WARRANTIES
               ------------------------------

     Each of the Seller and McKesson represents and warrants (a) as to the
matters set forth in Section 5.1 of the Agreement as if such representations and
warranties were made on the date hereof, (b) that the execution and delivery of
this Amendment and the performance of its obligations under the Agreement as
amended hereby (as so amended, the "Amended Agreement") (i) are within its
corporate powers, (ii) have been duly authorized by all necessary corporate
action, and (iii) do not and will not constitute a material default under any
provision of law or of its charter or by-laws or of any indenture, loan
agreement or other contract, order or decree which is binding upon it, and (c)
that the Amended Agreement is the legal, valid and binding obligation of it,
enforceable against it in accordance with its terms.

     SECTION 3 EFFECTIVENESS
               -------------

     The amendments set forth in Section 1 hereof shall become effective on
September 29, 1999, provided that the Managing Agents shall have received
counterparts of this Amendment executed by each of the Parties hereto.

     SECTION 4 MISCELLANEOUS
               -------------

     (a)  Continuing Effectiveness, etc.  As herein amended, the Agreement shall
          ------------------------------
          remain in full force and effect and is hereby ratified and confirmed
          in all respects. After the effectiveness hereof, all references to the
          Agreement in the Receivables Purchase Agreement or any other related
          document shall refer to the Amended Agreement.

     (b)  Counterparts. This Amendment may be executed in any number of
          ------------
          counterparts and by the different Parties on separate counterparts,
          and each such counterpart shall be deemed to be an original but all
          such counterparts shall together constitute one and the same
          Amendment.

     (c)  Expenses. McKesson agrees to pay the costs and expenses of the
          --------
          Managing Agents in connection with the negotiation, preparation,
          execution and delivery of this Amendment.

     (d)  Governing Law. This Amendment shall be a contract made under and
          -------------
          governed by the internal laws of the State of New York.

     IN WITNESS WHEREOF, the Parties have caused this Amendment to be executed
by their duly authorized officers as of the day and year first above written.
<PAGE>

                         CGSF FUNDING CORPORATION, as the Seller

                         By:__________________________________
                         Name:
                         Title:

                         Address:   One Post Street
                                    San Francisco, California  94104
                         Fax:

                         McKESSON HBOC, INC., as the Servicer

                         By:__________________________________
                         Name:
                         Title:

                         Address:   One Post Street
                                    San Francisco, California  94104
                         Fax:

                         PREFERRED RECEIVABLES FUNDING
                         CORPORATION, as a Conduit

                         By:__________________________________
                              Authorized Signatory

                         Address:   c/o Bank One, NA, as Managing Agent
                                    Asset Backed Finance
                                    Suite 0079, 1-19
                                    1 Bank One Plaza
                                    Chicago, Illinois  60670-0019
                         Fax:       (312) 732-1844

<PAGE>

                         FALCON ASSET SECURITIZATION
                         CORPORATION, as a Conduit

                         By:__________________________________
                              Authorized Signatory

                         Address:   c/o Bank One, NA, as Managing Agent
                                    Asset Backed Finance
                                    Suite 0079, 1-19
                                    1 Bank One Plaza
                                    Chicago, Illinois  60670-0019
                         Fax:       (312) 732-1844

                         BLUE RIDGE ASSET FUNDING CORPORATION, as a Conduit

                         By:  Wachovia Bank, N.A., as Attorney-In-Fact

                         By:__________________________________
                         Name:
                         Title:

                         Address:   191 Peachtree Street, NE
                                    Atlanta, Georgia  30303
                         Fax:       (404) 332-5152

<PAGE>

                              BANK ONE, NA (Main Office Chicago) (formerly known
                              as THE FIRST NATIONAL BANK OF CHICAGO), as a
                              Committed Purchaser for PREFCO and Falcon, a
                              Financial Institution, a Managing Agent and as
                              Collateral Agent

                         By:__________________________________
                         Name:
                         Title:

                         Address:   Bank One, NA
                                    Asset Backed Finance
                                    Suite 0596, 1-21
                                    1 Bank One Plaza
                                    Chicago, Illinois  60670-0596
                         Fax:       (312) 732-4487

                         WACHOVIA BANK, N.A., as a Committed Purchaser for Blue
                         Ridge, a Financial Institution and a Managing Agent

                         By:__________________________________
                         Name:
                         Title:

                         Address:   191 Peachtree Street, NE
                                    Atlanta, Georgia  30303
                         Fax:       (404) 332-5152<PAGE>

                                                                  EXECUTION COPY

                                                                  Exhibit  10.37

                               SECOND AMENDMENT

                                      TO

                        RECEIVABLES PURCHASE AGREEMENT

          THIS SECOND AMENDMENT TO RECEIVABLES PURCHASE AGREEMENT ("Amendment"),
                                                                    ---------
dated as of December 6, 1999, is among CGSF Funding Corporation, a Delaware
corporation ("Seller"), McKesson HBOC, Inc., a Delaware corporation (the
              ------
"Servicer"; the Servicer together with the Seller, the "Seller Parties" and each
 --------                                               --------------
a "Seller Party"), the funding entities parties hereto (the "Original Financial
   ------------                                              ------------------
Institutions"), Preferred Receivables Funding Corporation ("PREFCO"), Falcon
------------                                                ------
Asset Securitization Corporation ("Falcon") and Blue Ridge Asset Funding
                                   ------
Corporation ("Blue Ridge"; PREFCO, Falcon and Blue Ridge being referred to
              ----------
collectively as the "Original Conduits"), Bank One, NA (formerly known as The
                     -----------------
First National Bank of Chicago, "Bank One") and Wachovia Bank, N.A.
                                 --------
(collectively, the "Original Managing Agents") and Bank One, as the collateral
                    ------------------------
agent (the "Collateral Agent"). Defined terms used herein and not otherwise
            ----------------
defined herein shall have the meaning given to them in the "Receivables Purchase
Agreement" (as hereinafter defined).

          WHEREAS,  the Seller, the Servicer, the Original Financial
Institutions, the Original Conduits, the Original Managing Agents and the
Collateral Agent are parties (collectively, the "Original Parties") to the
                                                 ----------------
Receivables Purchase Agreement dated as of June 25, 1999, as amended by the
First Amendment thereto dated as of September 29, 1999 (the "Receivables
                                                             -----------
Purchase Agreement"); and
------------------

          WHEREAS, the Original Parties have agreed to amend the Receivables
Purchase Agreement on the terms and conditions set forth herein to, inter alia,
                                                                    ----- ----
(i) add Liberty Street Funding Corp. to the Receivables Purchase Agreement as a
Conduit and (ii) add The Bank of Nova Scotia to the Receivables Purchase
Agreement as (x) a Committed Purchaser for Liberty Street, (y) a Financial
Institution and (z) a Managing Agent.

          NOW, THEREFORE, in consideration of the premises set forth above, and
for other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the Original Parties agree as follows:

          1.  Amendment to the Receivables Purchase Agreement.  Effective as of
              -----------------------------------------------
the date first above written and subject to the execution of this Amendment by
the parties hereto and the
<PAGE>

satisfaction of the conditions precedent set forth in Section 2 below, the
                                                      ---------
Receivables Purchase Agreement shall be and hereby is amended as
follows:

     a.   To the extent not otherwise specifically set forth herein, (i) each
          reference to "The First National Bank of Chicago" in the Receivables
          Purchase Agreement shall be replaced with a reference to "Bank One, NA
          (formerly known as The First National Bank of Chicago)" and (ii)  each
          reference to "First Chicago" shall be replaced with a reference to
          "Bank One".

     b.   The preamble to the Receivables Purchase Agreement is hereby amended
          to:

          (i)   delete the words "and Blue Ridge Asset Funding Corporation
          (`Blue Ridge'; PREFCO, Falcon and Blue Ridge being referred to
            ----------
          collectively as the `Conduits', and together with the Financial
                               --------
          Institutions, the`Purchasers')" and to substitute therefor the words
                            ----------
          ",Blue Ridge Asset Funding Corporation (`Blue Ridge') and Liberty
                                                  ----------
          Street Funding Corp. (`Liberty Street'; PREFCO, Falcon, Blue Ridge and
                                 --------------
          Liberty Street being referred to collectively as the `Conduits', and
                                                                --------
          together with the Financial Institutions, the `Purchasers')"; and
                                                         ----------
          (ii)  delete the words "and Wachovia Bank, N.A." and to substitute
          therefor ", Wachovia Bank, N.A. and The Bank of Nova Scotia".

     c.   Section 5.1(m) of the Receivables Purchase Agreement is hereby amended
          --------------
          to insert the following language immediately before the period (".")
          at the end of clause (ii) thereof:
                        -----------

          "; provided, that with respect to each of clause (i) and clause (ii),
             --------                               ----------     -----------
          the insolvency of, or any other event with respect to, any Obligor or
          Obligors which results in the Eligible Receivables from such Obligor
          or Obligors ceasing to be Eligible Receivables shall not be deemed to
          have a Material Adverse Effect so long as (x) immediately after giving
          effect to such insolvency or event, as applicable, the Net Receivables
          Balance less the Aggregate Reserves equals or exceeds the Aggregate
          Capital, and (y) such insolvency or event, as applicable, does not
          materially adversely affect the ability of the initial Servicer to
          perform its obligations and duties under this Agreement".

     d.   Section 14.5(b) of the Receivables Purchase Agreement is hereby
          ---------------
          amended to delete the words "First Chicago or Wachovia" in the eighth
          line thereof and to substitute therefor the words "Bank One, Wachovia
          or Scotia".

     e.   Section 14.13 of the Receivables Purchase Agreement is hereby amended
          -------------
          to add the following clause (c) immediately after clause (b) thereof:
                               ----------

          "(c)  Scotia Roles.  Each of the Financial Institutions acknowledges
                ------------
          that Scotia acts, or may in the future act, (i) as Managing Agent for
          Liberty Street, (ii) as issuing and paying agent for Liberty Street's
          Commercial Paper, (iii) to provide credit or liquidity enhancement for
          the timely payment for the Commercial Paper and (iv) to provide other
          services from time to time for some or all of the

                                       2
<PAGE>

          Conduits (collectively, the `Scotia Roles'). Without limiting the
                                       ------------
          generality of this Section 14.13(c), each Financial Institution hereby
                             ----------------
          acknowledges and consents to any and all Scotia Roles and agrees that
          in connection with any Scotia Role, Scotia may take, or refrain from
          taking, any action that it, in its discretion, deems appropriate,
          including, without limitation, in its role as Managing Agent for the
          related Conduit, and the giving of notice to the Collateral Agent or a
          Managing Agent of a mandatory purchase pursuant to its liquidity back-
          stop program."

     f.   Exhibit I to the Receivables Purchase Agreement shall be amended to
          ---------
          add the following new definitions in the appropriate alphabetical
          locations:

          (i)   "`Bank One' means Bank One, NA (formerly known as The First
                  --------
          National Bank of Chicago), in its individual capacity, and its
          successors."

          (ii)  "`Bank One Group Reference Bank' means Bank One or such other
                  -----------------------------
          bank as Bank One shall designate with the consent of Seller."

          (iii) "`Liberty Street' has the meaning set forth in the preamble to
                  --------------
this Agreement."

          (iv)  "`Scotia' means The Bank of Nova Scotia, in its individual
                  ------
          capacity, and its successors."

          (v)   "`Scotia Group Reference Bank' means Scotia or such other bank
                  ---------------------------
          as Scotia shall designate with the consent of Seller."

     g.   The definition of "Applicable Margin" in Exhibit I to the Receivables
                                                   ---------
          Purchase Agreement is hereby deleted in its entirety and the following
          definition shall be substituted therefor:

          "`Applicable Margin' means, on any date and with respect to each
            -----------------
          funding made at the LIBO Rate, the "Applicable Margin" then in effect
          under and as defined in the Revolving Credit Agreement; provided,
                                                                  --------
          however, that if the Revolving Credit Agreement shall terminate, by
          -------
          acceleration or otherwise, `Applicable Margin' shall mean the
          Applicable Margin as in effect under and as defined in the Revolving
          Credit Agreement on the date of such termination."

     h.   The definition of "Applicable Rating Level" in Exhibit I to the
                                                         ---------
          Receivables Purchase Agreement is hereby deleted in its entirety.

     i.   The definition of "Base Rate" in Exhibit I to the Receivables Purchase
                                           ---------
          Agreement is hereby amended to:

          (i)   delete the words "Reference Bank" in clause (a) and to
          substitute the words "Bank One Group Reference Bank" therefor;

          (ii)  delete the word "and" immediately before clause (b) and to
          substitute a comma (",") therefor; and

                                       3
<PAGE>

          (iii) add the following language immediately before the period (".")
          at the end thereof:

          "and (c), with respect to Liberty Street and its Financial
          Institutions, a rate per annum equal to the corporate base rate, prime
          rate or base rate of interest, as applicable, announced by the Scotia
          Group Reference Bank from time to time, changing when and as such rate
          changes".

     j.   The definition of "Conduit Percentage" in Exhibit I to the Receivables
                                                    ---------
          Purchase Agreement is hereby deleted in its entirety.

     k.   The definition of "Federal Funds Effective Rate" in Exhibit I to the
                                                              ---------
          Receivables Purchase Agreement is hereby amended to delete the words
          "Reference Bank" in clause (b) and to substitute therefor the word
          "Wachovia".

     l.   The definition of "LIBO Rate" in Exhibit I to the Receivables Purchase
                                           ---------
          Agreement is hereby amended to:

          (i)   delete each reference to "Reference Bank" in clause (a) and, in
          each case, to substitute the words "Bank One Group Reference Bank"
          therefor;

          (ii)  delete the word "and" immediately before clause (b); and

          (iii) add the following language immediately before the period (".")
          at the end thereof:

          "; and

               (c)  with respect to Liberty Street and its Financial
          Institutions, the rate per annum equal to the sum of (i) (x) the rate
          at which deposits in U.S. Dollars are offered by the Scotia Group
          Reference Bank to first-class banks in the London interbank market at
          approximately 11:00 a.m. (London time) two Business Days prior to the
          first day of the relevant Tranche Period, such deposits being in the
          approximate amount of the Capital of the Purchaser Interest to be
          funded or maintained, divided by (y) one minus the maximum aggregate
                                ----------         -----
          reserve requirement (including all basic, supplemental, marginal or
          other reserves) which is imposed against the Scotia Group Reference
          Bank in respect of Eurocurrency liabilities, as defined in Regulation
          D of the Board of Governors of the Federal Reserve System as in effect
          from time to time (expressed as a decimal), applicable to such Tranche
          Period plus (ii) the Applicable Margin, rounded, if necessary, to the
                 ----
          next higher 1/16 of 1%".

     m.   The definition of "Managing Agent" in Exhibit I to the Receivables
                                                ---------
          Purchase Agreement is hereby deleted in its entirety and the following
          definition shall be substituted therefor:

          "`Managing Agent' means, as to any Conduit, the financial institution
            --------------
          responsible for the administration of such Conduit's Commercial Paper
          program and related

                                       4
<PAGE>

          activities. As of the date hereof, (a) Bank One is the Managing Agent
          for PREFCO and Falcon and their Committed Purchasers, (b) Wachovia is
          the Managing Agent for Blue Ridge and its Committed Purchasers and (c)
          Scotia is the Managing Agent for Liberty Street and its Committed
          Purchasers."

     n.   The definition of "Managing Agent Percentage" in Exhibit I to the
                                                           ---------
          Receivables Purchase Agreement is hereby deleted in its entirety and
          the following definition shall be substituted therefor:

          "`Managing Agent Percentage' means, (a) with respect to Bank One, a
            -------------------------
          fraction (expressed as a percentage) equal to 10/17 at all times prior
          to January 20, 2000 and 8/17 at all times on and after such date, (b)
          with respect to Wachovia, a fraction (expressed as a percentage) equal
          to 5/17 and (c) with respect to Scotia, a fraction (expressed as a
          percentage) equal to 2/17 at all times prior to January 20, 2000 and
          4/17 at all times on and after such date."

     o.   The definition of "Material Adverse Effect" in Exhibit I to the
                                                         ---------
          Receivables Purchase Agreement is hereby amended to add the following
          language immediately before the period (".") at the end thereof:

          "; provided, that the insolvency of, or any other event with respect
             --------
          to, any Obligor or Obligors which results in the Eligible Receivables
          from such Obligor or Obligors ceasing to be Eligible Receivables shall
          not be deemed to have a "Material Adverse Effect" so long as (x)
          immediately after giving effect to such insolvency or event, as
          applicable, the Net Receivables Balance less the Aggregate Reserves
          equals or exceeds the Aggregate Capital, and (y) such insolvency or
          event, as applicable, does not materially adversely affect the ability
          of the initial Servicer to perform its obligations and duties under
          this Agreement".

     p.   The definition of "Material Subsidiary" in Exhibit I to the
                                                     ---------
          Receivables Purchase Agreement is hereby amended to delete the words
          "(i) Medis and (ii) any other" in the first line thereof and to
          substitute therefor the word "any".

     q.   The definition of "Medis" in Exhibit I to the Receivables Purchase
                                       ---------
          Agreement is hereby deleted in its entirety.

     r.   The definition of "Pro Rata Shares" in Exhibit I to the Receivables
                                                 ---------
          Purchase Agreement is hereby deleted in its entirety and the following
          definition shall be substituted therefor:

          "`Pro Rata Share' means, for each Financial Institution or Conduit, as
            --------------
          applicable, a fraction (expressed as a percentage), the numerator of
          which is the Capital associated with such Financial Institution or
          Conduit and the denominator of which is the Aggregate Capital;
          provided, however, that (1) solely with respect to the reference to
          --------  -------
          `Pro Rata Shares' in Section 1.2, at all times prior to January 20,
                               -----------
          2000, (x) the Pro Rata Share for each of PREFCO, Falcon and Blue Ridge
          and their related Financial Institutions shall be 0% and (y) the Pro
          Rata Share for Liberty Street and its related Financial Institutions
          shall be 100%, and (2) solely

                                       5
<PAGE>

          with respect to the reference to `Pro Rata Shares' in Section 11.6, at
                                                                ------------
          all times prior to January 20, 2000, (w) the Pro Rata Share for the
          Financial Institutions which are Committed Purchasers for PREFCO shall
          be deemed to be 5/17, (x) the Pro Rata Share for the Financial
          Institutions which are Committed Purchasers for Falcon shall be deemed
          to be 5/17, (y) the Pro Rata Share for the Financial Institutions
          which are Committed Purchasers for Blue Ridge shall be deemed to be
          5/17, and (z) the Pro Rata Share for the Financial Institutions which
          are Committed Purchasers for Liberty Street shall be deemed to be
          2/17."

     s.   The definition of "Purchase Limit" in Exhibit I to the Receivables
                                                ---------
          Purchase Agreement is hereby amended to delete the reference to
          "$750,000,000" and to substitute therefor "$850,000,000".

     t.   The definition of "Purchaser Interest" in Exhibit I to the Receivables
                                                    ---------
          Purchase Agreement is hereby amended to:

               (i)  add the words "with respect to any Purchaser," immediately
          before the words "at any time" in the first line thereof; and

               (ii) delete the words "C = the aggregate outstanding Capital of
          all Purchaser Interests in a Purchase Group" and to substitute
          therefor "C = the Capital associated with such Purchaser Interest".

     u.   The definition of "Reference Bank" in Exhibit I to the Receivables
                                                ---------
          Purchase Agreement is hereby deleted in its entirety.

     v.   The definition of "Revolving Credit Agreement" in Exhibit I to the
                                                            ---------
          Receivables Purchase Agreement is hereby deleted in its entirety and
          the following definition shall be substituted therefor:

          "`Revolving Credit Agreement' means that certain Credit Agreement
            --------------------------
          dated as of October 22, 1999 among McKesson, Bank of America, N.A., as
          administrative agent, The Chase Manhattan Bank, First Union National
          Bank, Bank One and Morgan Guaranty Trust Company, as documentation
          agents, and the other financial institutions parties thereto (as
          amended, restated, supplemented or otherwise modified from time to
          time) providing a 364-day revolving credit facility in favor of
          McKesson, or any successor or replacement facility."

     w.   Exhibits II, V and VII and Schedule A to the Receivables Purchase
          -----------  -     ---     ----------
          Agreement are hereby deleted in their entirety and Exhibits II, V and
                                                             -----------  -
          VII and Schedule A attached hereto and made a part hereof are
          ---     ----------
          substituted therefor.

          2.  Conditions Precedent. This Amendment shall become effective as of
              --------------------
the date above written if and only if the Managing Agents have received:

          a.  duly executed originals of this Amendment from each of the
Original Parties; and

                                       6
<PAGE>

          b.  a duly executed Supplement to Receivables Purchase Agreement in
the form of Annex I attached hereto and made a part hereof from Liberty Street
            -------
and Scotia.

          3.  Representations and Warranties of the Seller Parties. Each of the
              ----------------------------------------------------
Seller Parties hereby represents and warrants as follows:

          a.  This Amendment and the Receivables Purchase Agreement, as amended
hereby, constitute legal, valid and binding obligations of such Seller Party and
are enforceable against such Seller Party in accordance with their terms.

          b.  Upon the  effectiveness of this Amendment, each Seller Party
hereby reaffirms all representations and warranties made in the Receivables
Purchase Agreement, and to the extent the same are not amended hereby, agrees
that all such representations and warranties shall be deemed to have been remade
as of the date of delivery of this Amendment, unless and to the extent that any
such representation and warranty is stated to relate solely to an earlier date,
in which case such representation and warranty shall be true and correct as of
such earlier date.

          4.  Reference to and Effect on the Receivables Purchase Agreement.
              -------------------------------------------------------------

          a.  Upon the effectiveness of Section 1 hereof, on and after the date
                                        ---------
hereof, each reference in the Receivables Purchase Agreement to "this
Receivables Purchase Agreement," "hereunder," "hereof," "herein" or words of
like import shall mean and be a reference to the Receivables Purchase Agreement
as amended hereby.

          b.  The Receivables Purchase Agreement, as amended hereby, and all
other documents, instruments and agreements executed and/or delivered in
connection therewith, shall remain in full force and effect, and are hereby
ratified and confirmed.

          c.  Except as expressly provided herein, the execution, delivery and
effectiveness of this Amendment shall not operate as a waiver of any right,
power or remedy of the Managing Agents, the Financial Institutions or the
Collateral Agent, nor constitute a waiver of any provision of the Receivables
Purchase Agreement or any other documents, instruments and agreements executed
and/or delivered in connection therewith.

          5.  Governing Law. This Amendment shall be governed by and construed
              -------------
in accordance with the internal laws (as opposed to the conflict of law
provisions) of the State of New York.

          6.  Headings. Section headings in this Amendment are included herein
              --------
for convenience of reference only and shall not constitute a part of this
Amendment for any other purpose.

          7.  Counterparts. This Amendment may be executed by one or more of
              ------------
the parties to the Amendment on any number of separate counterparts and all of
said counterparts taken together shall be deemed to constitute one and the same
instrument.

                                       7
<PAGE>

          IN WITNESS WHEREOF, this Amendment has been duly executed and
delivered on the date first above written.

                                 CGSF FUNDING CORPORATION, as the Seller

                                 By:__________________________________
                                 Name:
                                 Title:

                                 McKESSON HBOC, INC., as the Servicer

                                 By:__________________________________
                                 Name:
                                 Title:

                                 PREFERRED RECEIVABLES FUNDING
                                 CORPORATION, as a Conduit

                                 By:__________________________________
                                       Authorized Signatory

                                 FALCON ASSET SECURITIZATION
                                 CORPORATION, as a Conduit

                                 By:__________________________________
                                       Authorized Signatory

                                 BLUE RIDGE ASSET FUNDING CORPORATION, as a
                                 Conduit

                                 By:  Wachovia Bank, N.A., as Attorney-In-Fact

                                 By:__________________________________
                                 Name:
                                 Title:

                                 BANK ONE, NA (Main Office Chicago) (formerly
                                 known as The First National Bank of Chicago),

                                       8
<PAGE>

                                 as a Committed Purchaser for PREFCO and
                                 Falcon, a Financial Institution, a Managing
                                 Agent and as Collateral Agent

                                 By:__________________________________
                                 Name: Elizabeth Cohen
                                 Title: Vice President

                                 WACHOVIA BANK, N.A., as a Committed Purchaser
                                 for Blue Ridge, a Financial Institution and a
                                 Managing Agent

                                 By:__________________________________
                                 Name:
                                 Title:

                                       9
<PAGE>

                                    ANNEX I

                                      to

              Second Amendment to Receivables Purchase Agreement

                 SUPPLEMENT TO RECEIVABLES PURCHASE AGREEMENT

          Reference is hereby made to the Receivables Purchase Agreement (as
amended by the First Amendment thereto dated as of September 29, 1999 and the
Second Amendment thereto dated as of December 6, 1999, the "Receivables Purchase
                                                            --------------------
Agreement") dated as of June 25, 1999 CGSF Funding Corporation, a Delaware
---------
corporation ("Seller"), McKesson HBOC, Inc., a Delaware corporation
              ------
("McKesson"), as initial Servicer (the "Servicer" together with the Seller, the
  --------                              --------
"Seller Parties" and each a "Seller Party"), the funding entities parties
 --------------              ------------
thereto (the "Original Financial Institutions"), Preferred Receivables Funding
              -------------------------------
Corporation ("PREFCO"), Falcon Asset Securitization Corporation ("Falcon") and
              ------                                              ------
Blue Ridge Asset Funding Corporation ("Blue Ridge"; PREFCO, Falcon and Blue
                                       ----------
Ridge being referred to collectively as the "Original Conduits"), Bank One, NA
                                             -----------------
(formerly known as The First National Bank of Chicago, "Bank One") and Wachovia
                                                        --------
Bank, N.A. (each, an "Original Managing Agent" and collectively, the "Original
                      ------------------------                        --------
Managing Agents") and Bank One, as collateral agent for the Purchasers
---------------
thereunder or any successor collateral agent hereunder (together with its
successors and assigns hereunder, the "Collateral Agent"). Capitalized terms
                                       ----------------
used herein and not defined herein shall have the meanings given to them in the
Receivables Purchase Agreement.

          By its execution below, Liberty Street Funding Corp. ("Liberty
                                                                 -------
Street") (a) agrees to become, and does hereby become, a Conduit under the
------
Receivables Purchase Agreement and (b) agrees to be bound by such Receivables
Purchase Agreement as if originally a party thereto.

          By its execution below, The Bank of Nova Scotia ("Scotia") (a) agrees
                                                            ------
to become, and does hereby become, (i) a Committed Purchaser for Liberty Street,
(ii) a Financial Institution and (iii) a Managing Agent under the Receivables
Purchase Agreement and (b) agrees to be bound by such Receivables Purchase
Agreement as if originally a party thereto.

                                       10
<PAGE>

     IN WITNESS WHEREOF, Liberty Street and Scotia have executed and delivered
this Supplement to Receivables Purchase Agreement as of this 6th day of
December, 1999.

                         LIBERTY STREET FUNDING CORP., as a Conduit

                         By:__________________________________
                         Name:
                         Title:

                         Address:       c/o Global Securitization Services, LLC
                                        114 West 47th Street, Suite 1715
                                        New York, New York 10036
                         Attention:     Andrew L. Stidd
                         Telephone:     (212) 302-8330
                         Fax:           (212) 302-8767

                         With a copy to:

                         Address:       The Bank of Nova Scotia
                                        One Liberty Plaza
                                        New York, New York  10006
                         Attention:     Dorothy Poli
                         Telephone:     (212) 225-5000
                         Fax:           (212) 225-5090

                         THE BANK OF NOVA SCOTIA, as a Committed Purchaser for
                         Liberty Street, a Financial Institution and a Managing
                         Agent

                         By:__________________________________
                         Name:   Rodothea Poli
                         Title:  Managing Director

                         Address:       One Liberty Plaza
                                        New York, New York  10006
                         Attention:     Dorothy Poli
                         Telephone:     (212) 225-5000
                         Fax:           (212) 225-5090

                                       11
<PAGE>

                                  EXHIBIT II

                            FORM OF PURCHASE NOTICE

                                    [Date]

[Bank One, NA,
  as Managing Agent for Preferred Receivables
  Funding Corporation and Falcon Asset
  Securitization Corporation
Suite 0079, 1-21
1 Bank One Plaza
Chicago, Illinois 60670

Attention:  Asset Backed Finance]

[Wachovia Bank, N.A.
  as Managing Agent for Blue Ridge
  Asset Funding Corporation
191 Peachtree Street, NE-GA-423
Atlanta, Georgia 30303

Attention:  Elizabeth Wagner]

[The Bank of Nova Scotia,
  as Managing Agent for Liberty
  Street Funding Corp.
One Liberty Plaza
New York, New York  10006

Attention: [________________]]

Re:  Purchase Notice
     ---------------

Ladies and Gentlemen:

          The undersigned refers to the Receivables Purchase Agreement, dated as
of June 25, 1999 (the "Receivables Purchase Agreement," the terms defined
therein being used herein as therein defined), among the undersigned, as Seller
and McKesson HBOC, Inc., as initial Servicer, Preferred Receivables Funding
Corporation, Falcon Asset Securitization Corporation, Blue Ridge Asset Funding
Corporation and Liberty Street Funding Corp.  (collectively, the "Conduits"),
certain Financial Institutions parties thereto, Bank One, NA (formerly known as,
The First National Bank of Chicago, "Bank One"), Wachovia Bank, N.A. and The
                                     --------
Bank of Nova Scotia, as Managing Agents, and Bank One, as Collateral Agent for
the Conduits and such Financial Institutions, and hereby gives you notice,
irrevocably, pursuant to Section 1.2 of the Receivables Purchase Agreement, that
the undersigned hereby requests an Incremental Purchase under the Receivables
Purchase Agreement, and in that connection sets forth below the

                                       12
<PAGE>

information relating to such Incremental Purchase (the "Proposed Purchase") as
required by Section 1.2 of the Receivables Purchase Agreement:

          (i)       The Business Day of the Proposed Purchase is [insert
purchase date], which date is at least two (2) Business Days after the date
hereof.

          (ii)      The requested Purchase Price in respect of the Proposed
Purchase is $__________.

          (iii)     If the Proposed Purchase to be funded by the Financial
Institutions, the requested Discount Rate is ____________ and the requested
Tranche Period is __________.

          (iv)      The requested maturity date for the Tranche Period is
_______________.

          The undersigned hereby certifies that the following statements are
true on the date hereof, and will be true on the date of the Proposed Purchase
(before and after giving effect to the Proposed Purchase):

          (i)       the representations and warranties of the undersigned set
forth in Section 5.1 of the Receivables Purchase Agreement are true and correct
on and as of the date of such Proposed Purchase as though made on and as of such
date;

          (ii)      no event has occurred and is continuing, or would result
from such Proposed Purchase, that will constitute an Amortization Event or a
Potential Amortization Event; and

          (iii)     the Facility Termination Date shall not have occurred, the
aggregate Capital of all Purchaser Interests shall not exceed the Purchase Limit
and the aggregate Receivable Interests shall not exceed 100%.

                              Very truly yours,

                              CGSF FUNDING CORPORATION

                              By:_________________________
                              Name:
                              Title:

                                       13
<PAGE>

                                   EXHIBIT V

                        FORM OF COMPLIANCE CERTIFICATE

To:  Bank One, NA (formerly known as The First National Bank of Chicago),
     Wachovia Bank, N.A. and The Bank of Nova Scotia, as Managing Agents

     This Compliance Certificate is furnished pursuant to that certain
Receivables Purchase Agreement dated as of June 25, 1999 among CGSF Funding
Corporation (the "Seller"), McKesson HBOC, Inc. (the "Servicer"), the Purchasers
                  ------                              --------
party thereto Bank One, NA (formerly known as The First National Bank of
Chicago, "Bank One"), Wachovia Bank, N.A. and The Bank of Nova Scotia, as
          --------
managing agents and Bank One, as collateral agent for such Purchasers (the
"Agreement").
 ---------

     THE UNDERSIGNED HEREBY CERTIFIES THAT:

     1.   I am the duly elected _____________________ of Seller.

     2.   I have reviewed the terms of the Agreement and I have made, or have
caused to be made under my supervision, a detailed review of the transactions
and conditions of Seller and its Subsidiaries during the accounting period
covered by the attached financial statements.

     3.   The examinations described in paragraph 2 did not disclose, and I have
no knowledge of, the existence of any condition or event which constitutes an
Amortization Event or Potential Amortization Event, as each such term is defined
under the Agreement, during or at the end of the accounting period covered by
the attached financial statements or as of the date of this Certificate, except
as set forth in paragraph 5 below.

     4.   Schedule I attached hereto sets forth financial data and computations
          ----------
evidencing the compliance with certain covenants of the Agreement, all of which
data and computations are true, complete and correct.

     5.   Described below are the exceptions, if any, to paragraph 3 by listing,
in detail, the nature of the condition or event, the period during which it has
existed and the action which Seller has taken, is taking, or proposes to take
with respect to each such condition or event:

                                       14
<PAGE>

     The foregoing certifications, together with the computations set forth in
Schedule I hereto and the financial statements delivered with this Certificate
----------
in support hereof, are made and delivered this ____ day of ______________,
_____.

                              _________________________________
                              Name:
                              Title:

                                       15
<PAGE>

                     SCHEDULE I TO COMPLIANCE CERTIFICATE

A.   Schedule of Compliance as of __________, ____ with Section ___ of the
Agreement.  Unless otherwise defined herein, the terms used in this Compliance
Certificate have the meanings ascribed thereto in the Agreement.

This schedule relates to the month ended:  _________

                                       16
<PAGE>

                                  EXHIBIT VII

                         FORM OF ASSIGNMENT AGREEMENT

          THIS ASSIGNMENT AGREEMENT is entered into as of the [___] day of
[[____________, ____], by and between _____________________ ("Seller") and
                                                              ------
__________________ ("Purchaser").
                     ---------

                            PRELIMINARY STATEMENTS

          A.   This Assignment Agreement is being executed and delivered in
accordance with Section 12.1(b) of that certain Receivables Purchase Agreement
dated as of June 25, 1999 by and among CGSF Funding Corporation, as Seller,
McKesson HBOC, Inc., as Servicer, Preferred Receivables Funding Corporation
("PREFCO"), Falcon Asset Securitization Corporation ("Falcon"), Blue Ridge Asset
  ------                                              ------
Funding Corporation ("Blue Ridge"), Liberty Street Funding Corp. ("Liberty
                      ----------                                   -------
Street", and together with PREFCO,  Falcon and Blue Ridge, the "Conduits"), Bank
------                                                          --------
One, NA (formerly known as The First National Bank of Chicago, "Bank One"),
                                                                --------
Wachovia Bank, N.A. and The Bank of Nova Scotia, as Managing Agents, Bank One as
Collateral Agent, and the Financial Institutions party thereto (as amended,
modified or restated from time to time, the "Purchase Agreement").  Capitalized
                                             ------------------
terms used and not otherwise defined herein are used with the meanings set forth
or incorporated by reference in the Purchase Agreement.

          B.   The Seller is a Financial Institution party to the Purchase
Agreement, and the Purchaser wishes to become a Financial Institution
thereunder; and

          C.   The Seller is selling and assigning to the Purchaser an undivided
____________% (the "Transferred Percentage") interest in all of Seller's rights
                    ----------------------
and obligations under the Purchase Agreement and the Transaction Documents,
including, without limitation, the Seller's  Commitment, the Seller's
obligations under [describe applicable Liquidity Agreement] and (if applicable)
the Capital of the Seller's Purchaser Interests as set forth herein;

          The parties hereto hereby agree as follows:

          1.   This sale, transfer and assignment effected by this Assignment
Agreement shall become effective (the "Effective Date") two (2) Business Days
                                       --------------
(or such other date selected by the Collateral Agent in its sole discretion)
following the date on which a notice substantially in the form of Schedule II to
                                                                  -----------
this Assignment Agreement ("Effective Notice") is delivered by the Collateral
                            ----------------
Agent to the Conduits, the Seller and the Purchaser.  From and after the
Effective Date, the Purchaser shall be a Financial Institution party to the
Purchase Agreement for all purposes thereof as if the Purchaser were an original
party thereto and the Purchaser agrees to be bound by all of the terms and
provisions contained therein.

          2.   If the Seller has no outstanding Capital under the Purchase
Agreement, on the Effective Date, Seller shall be deemed to have hereby
transferred and assigned to the Purchaser, without recourse, representation or
warranty (except as provided in paragraph 6 below), and the Purchaser shall be
deemed to have hereby irrevocably taken, received and assumed from the Seller,
the Transferred Percentage of the Seller's Commitment and all rights

                                       17
<PAGE>

and obligations associated therewith under the terms of the Purchase Agreement,
including, without limitation, the Transferred Percentage of the Seller's future
funding obligations under Section 4.1 of the Purchase Agreement.

          3.   If the Seller has any outstanding Capital under the Purchase
Agreement, at or before 12:00 noon, local time of the Seller, on the Effective
Date the Purchaser shall pay to the Seller, in immediately available funds, an
amount equal to the sum of (i) the Transferred Percentage of the outstanding
Capital of the Seller's Purchaser Interests (such amount, being hereinafter
referred to as the "Purchaser's Capital"); (ii) all accrued but unpaid (whether
                    -------------------
or not then due) Yield attributable to the Purchaser's Capital; and (iii)
accruing but unpaid fees and other costs and expenses payable in respect of the
Purchaser's Capital for the period commencing upon each date such unpaid amounts
commence accruing, to and including the Effective Date (the "Purchaser's
                                                             -----------
Acquisition Cost");
----------------
whereupon, the Seller shall be deemed to have sold, transferred and assigned to
the Purchaser, without recourse, representation or warranty (except as provided
in paragraph 6 below), and the Purchaser shall be deemed to have hereby
irrevocably taken, received and assumed from the Seller, the Transferred
Percentage of the Seller's Commitment and the Capital of the Seller's Purchaser
Interests (if applicable) and all related rights and obligations under the
Purchase Agreement and the Transaction Documents, including, without limitation,
the Transferred Percentage of the Seller's future funding obligations under
Section 4.1 of the Purchase Agreement.

          4.   Concurrently with the execution and delivery hereof, the Seller
will provide to the Purchaser copies of all documents requested by the Purchaser
which were delivered to such Seller pursuant to the Purchase Agreement.

          5.   Each of the parties to this Assignment Agreement agrees that at
any time and from time to time upon the written request of any other party, it
will execute and deliver such further documents and do such further acts and
things as such other party may reasonably request in order to effect the
purposes of this Assignment Agreement.

          6.   By executing and delivering this Assignment Agreement, the Seller
and the Purchaser confirm to and agree with each other, the Collateral Agent and
the Financial Institutions as follows:  (a) other than the representation and
warranty that it has not created any Adverse Claim upon any interest being
transferred hereunder, the Seller makes no representation or warranty and
assumes no responsibility with respect to any statements, warranties or
representations made by any other Person in or in connection with the Purchase
Agreement or the Transaction Documents or the execution, legality, validity,
enforceability, genuineness, sufficiency or value of the Purchaser, the Purchase
Agreement or any other instrument or document furnished pursuant thereto or the
perfection, priority, condition, value or sufficiency of any collateral; (b) the
Seller makes no representation or warranty and assumes no responsibility with
respect to the financial condition of the Seller, any Obligor, any Seller
Affiliate or the performance or observance by the Seller, any Obligor, any
Seller Affiliate of any of their respective obligations under the Transaction
Documents or any other instrument or document furnished pursuant thereto or in
connection therewith; (c) the Purchaser confirms that it has received a copy of
the Transaction Documents, together with such other documents and

                                       18
<PAGE>

information as it has deemed appropriate to make its own credit analysis and
decision to enter into this Assignment Agreement; (d) the Purchaser will,
independently and without reliance upon the Collateral Agent, the Conduits, the
Seller or any other Financial Institution or Purchaser and based on such
documents and information as it shall deem appropriate at the time, continue to
make its own credit decisions in taking or not taking action under the Purchase
Agreement and the Transaction Documents; (e) the Purchaser appoints and
authorizes the Collateral Agent to take such action as collateral agent on its
behalf and to exercise such powers under the Transaction Documents as are
delegated to the Collateral Agent by the terms thereof, together with such
powers as are reasonably incidental thereto; (f) the Purchaser appoints and
authorizes the Collateral Agent to take such action as collateral agent on its
behalf and to exercise such powers under the Transaction Documents as are
delegated to the Collateral Agent by the terms thereof, together with such
powers as are reasonably incidental thereto; and (g) the Purchaser agrees that
it will perform in accordance with their terms all of the obligations which, by
the terms of the Purchase Agreement and the Transaction Documents, are required
to be performed by it as a Financial Institution or, when applicable, as a
Purchaser.

          7.   Each party hereto represents and warrants to and agrees with the
Collateral Agent that it is aware of and will comply with the provisions of the
Purchase Agreement, including, without limitation, Sections 4.1 and 14.6
thereof.

          8.   Schedule I hereto sets forth the revised Commitment of the Seller
               ----------
and the Commitment of the Purchaser, as well as administrative information with
respect to the Purchaser.

          9.   THIS ASSIGNMENT AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

          10.  The Purchaser hereby covenants and agrees that, prior to the date
which is one year and one day after the payment in full of all senior
indebtedness for borrowed money of the Conduits, it will not institute against,
or join any other Person in instituting against, any Conduit, any bankruptcy,
reorganization, arrangement, insolvency or liquidation proceedings or other
similar proceeding under the laws of the United States or any state of the
United States.

                                       19
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Assignment
Agreement to be executed by their respective duly authorized officers of the
date hereof.

                                   [SELLER]

                                   By:____________________________
                                   Name:
                                   Title:

                                   [Purchaser]

                                   By:____________________________
                                   Name:
                                   Title:

                                       20
<PAGE>

                      SCHEDULE I TO ASSIGNMENT AGREEMENT

                      LIST OF LENDING OFFICES, ADDRESSES

                      FOR NOTICES AND COMMITMENT AMOUNTS

Date: _______________, ____
----

Transferred Percentage:________%
----------------------

                 A-1            A-2            B-1           B-2
                 ---            ---            ---           ---
Outstanding
               Commitment    Commitment      Capital       Ratable

Seller          [existing]    [revised]      (if any)      Share
----------------------------------------------------------------

                 A-1            B-1               B-2
                 ---            ---               ---
                             Outstanding
               Commitment      Capital                Ratable
Purchaser    [initial]       (if any)                  Share
-----------------------------------------------------------

Address for Notices
-------------------
_____________
_____________
Attention:
Phone:
Fax:

                                       21
<PAGE>

                      SCHEDULE II TO ASSIGNMENT AGREEMENT

                               EFFECTIVE NOTICE

TO:________________________, Seller
     ________________________
     ________________________
     ________________________

TO:________________________, Purchaser
     ________________________
     ________________________
     ________________________

          The undersigned, as Collateral Agent under the Receivables Purchase
Agreement dated as of June 25, 1999 by and among CGSF Funding Corporation, as
Seller, McKesson HBOC, Inc., as Servicer, Preferred Receivables Funding
Corporation, ("PREFCO"), Falcon Asset Securitization Corporation ("Falcon"),
Blue Ridge Asset Funding Corporation ("Blue Ridge"), Liberty Street Funding
Corp. ("Liberty Street", and together with PREFCO and Falcon, the "Conduits"),
Bank One, NA (formerly known as The First National Bank of Chicago, "Bank One"),
Wachovia Bank, N.A.  and The Bank of Nova Scotia as Managing Agents, Bank One,
as Collateral Agent, and the Financial Institutions party thereto, hereby
acknowledges receipt of executed counterparts of a completed Assignment
Agreement dated as of ____________, ____ between __________________, as Seller,
and __________________, as Purchaser.  Terms defined in such Assignment
Agreement are used herein as therein defined.

          1.   Pursuant to such Assignment Agreement, you are advised that the
Effective Date will be ______________, ____.

          2.   The Managing Agent, on behalf of the affected Conduits, hereby
consents to the Assignment Agreement as required by Section 12.1(b) of the
Purchase Agreement.

                                       22
<PAGE>

          [3.  Pursuant to such Assignment Agreement, the Purchaser is required
to pay $____________ to the Seller at or before 12:00 noon (local time of the
Seller) on the Effective Date in immediately available funds.]

                         Very truly yours,

                         BANK ONE, NA (Main Office Chicago) (formerly known as
                         The First National Bank of Chicago), individually and
                         as Collateral Agent [and a Managing Agent]

                         By:__________________________
                         Title:

                                       23
<PAGE>

                                  SCHEDULE A

                     COMMITMENTS OF FINANCIAL INSTITUTIONS

                            PURCHASE GROUP:  PREFCO

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------
            Financial Institution                            Aggregate Commitment
            ---------------------                            --------------------
------------------------------------------------------------------------------------------------
<S>                                                <C>
Bank One, NA (formerly known as The First          $250,000,000 prior to January 20, 2000;
National Bank of Chicago)                          $200,000,000 from and after January 20, 2000

------------------------------------------------------------------------------------------------
</TABLE>

                            PURCHASE GROUP:  Falcon

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------
            Financial Institution                            Aggregate Commitment
            ---------------------                            --------------------
------------------------------------------------------------------------------------------------
<S>                                                <C>
Bank One, NA (formerly known as The First          $250,000,000 prior to January 20, 2000;
National Bank of Chicago)                          $200,000,000 from and after January 20, 2000

------------------------------------------------------------------------------------------------
</TABLE>

                          PURCHASE GROUP:  Blue Ridge

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------
            Financial Institution                            Aggregate Commitment
            ---------------------                            --------------------
------------------------------------------------------------------------------------------------
<S>                                                          <C>
Wachovia Bank, N.A.                                            $250,000,000

------------------------------------------------------------------------------------------------
</TABLE>

                        PURCHASE GROUP:  Liberty Street

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------
            Financial Institution                            Aggregate Commitment
            ---------------------                            --------------------
------------------------------------------------------------------------------------------------
<S>                                                <C>
The Bank of Nova Scotia                            $100,000,000 prior to January 20, 2000;
                                                   $200,000,000 from and after January 20, 2000

------------------------------------------------------------------------------------------------
</TABLE>

                                       24

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