Document:

AMENDMENT
      

    TO
      THE 

    LETTER
      OF INTENT

    

    THIS
      AMENDMENT TO THE LETTER OF INTENT is made and entered into as of October 25,
      2007 (this “Amendment”) between Karat Platinum LLC (the “Company”) and Sentra
      Consulting Corp. (“Purchaser”).

    

    WITNESSETH

     

    WHEREAS,
      the Company and Purchaser entered into a Letter of Intent dated June 21, 2007
      (the “LOI”; capitalized terms used herein not otherwise defined shall have the
      meanings given to such terms in the LOI); and

    

    WHEREAS,
      the parties desire to extend certain terms of the LOI as provided
      herein.

    

    NOW,
      THEREFORE, in consideration of the mutual covenants herein and other good and
      valuable consideration, the receipt and adequacy of which are hereby
      acknowledged, the parties hereby agree as follows:

    

    1. Consideration
      Warrants. In
      Paragraph 1 of the LOI the amount of Consideration Warrants shall be increased
      from 500,000 to 800,000. For purposes of clarification, such Consideration
      Warrants are the warrants currently issued to ABN AMRO Bank N.V. by the Company.
      The third sentence of Paragraph 1 shall be deleted in its entirety and restated
      as follows:

    

    “After
      the date hereof but prior to the Closing (hereafter defined), the prior written
      consent of the Company shall be required in the event the Purchaser desires
      to
      issue shares of common stock or other securities convertible into common stock.
      The Company acknowledges the shares of common stock and convertible securities
      issued and outstanding as of the date hereof, include 50,000 shares of common
      stock to be issued to the Purchaser’s transfer agent, and shares of common stock
      issuable upon the exercise of the Series A Convertible Preferred Stock, the
      Series B Convertible Preferred Stock and 96,000 warrants.” 

    

    2. Outside
      Closing Date. 
      The
      reference to Outside Closing Date in the LOI shall refer to January 31,
      2008.

    

    3. Reference.
      On and
      after the date hereof, each reference in the LOI to “this Agreement”,
“hereunder”, “hereof”, “herein” or words of like import, and each reference to
      the LOI in any other agreement, document or other instrument, shall mean, and
      be
      a reference to the LOI, as amended by the term and provisions of this Amendment.
      All other terms and provisions of the LOI shall remain in full force and
      effect.

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    4. Counterparts.
      This
      Amendment may be executed in one or more counterparts and by facsimile, and
      all
      of said counterparts taken together shall be deemed to constitute one and the
      same instrument.

    

    5. Captions.
      The
      captions used in this Amendment are intended for convenience of reference only,
      shall not constitute any part of this Amendment and shall not modify or affect
      in any manner the meaning or interpretation of any of the provisions of this
      Amendment.

    

    6. Binding
      Effect.
      This
      Amendment shall be binding upon and inure to the benefit of the respective
      heirs, executors, administrators, representatives and the permitted successors
      and assigns of the parties hereto.

    

    7. Governing
      Law.
      This
      Amendment and the rights and obligations of the parties under this Amendment
      shall be governed by and construed in accordance with the laws of the State
      of
      New York, without regard to conflict of laws rules applied in such
      state.

    

    

    [Remainder
      of this page intentionally left blank; signature pages to
      follow]

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

     

    IN
      WITNESS WHEREOF, the parties have executed this Amendment to the Note as of
      the
      date first written above.

    

     

    
      	 	
              KARAT
                PLATINUM LLC

              

              

              

              By:      
                /s/
                Gary M. Jacobs

              Name: 
                Gary
                M. Jacobs

              Title:   
                Chief
                Financial Officer and

               Chief
                Operating Officer

              

              

              SENTRA
                CONSULTING CORP.

              

              

              

              By:      
                /s/
                Philip Septimus

              Name:  Philip
                Septimus

              Title:    PresidentAMENDMENT
      

    TO
      THE 

    SECURED
      PROMISSORY NOTES

    

    THIS
      AMENDMENT TO THE SECURED PROMISSORY NOTES is made and entered into as of October
      23, 2007 (this “Amendment”) among Karat Platinum LLC (“Karat Platinum”) and
      Sentra Consulting Corp. (“Sentra”; collectively the “Parties”).

    

    WITNESSETH

     

    WHEREAS,
      as of the date hereof, Karat Platinum has issued a series of Secured Promissory
      Notes to Sentra in exchange for a series of loans to Karat Platinum in the
      aggregate principal amount of $960,000 (the “Notes”; capitalized terms used
      herein not otherwise defined shall have the meanings given to such terms in
      the
      Notes); 

    

    WHEREAS,
      the Parties desire to extend the maturity dates of the Notes on the terms and
      provisions contained in this Amendment;

    

    WHEREAS,
      Sentra desires to waive payment by Karat Platinum of any Default Interest which
      has accrued from the date of each Note until the date hereof.

    

    NOW,
      THEREFORE, in consideration of the mutual covenants herein and other good and
      valuable consideration, the receipt and adequacy of which are hereby
      acknowledged, the parties hereby agree as follows:

    

    1. Payment
      Date. The
      Principal Amount of each of the Notes shall be extended to up to ninety (90)
      days from the original maturity date of each of the Notes, respectively (the
      “Revised Payment Date”). Attached hereto is a schedule (Schedule 1.1) setting
      forth the date of issuance, principal amount, maturity date, date of default
      and
      Revised Payment Date with respect to each of the Notes.

    

    2. Waiver
      of
Default
      Interest. Notwithstanding
      any provision contained herein, Sentra waives payment by Karat Platinum of
      any
      Default Interest specified in the Notes with respect to each of the Notes.
      

    

    3. Reference.
      On and
      after the date hereof, each reference in the Notes to “this Note”, “hereunder”,
“hereof”, “herein” or words of like import, and each reference to the Note in
      any other agreement, document or other instrument, shall mean, and be a
      reference to the Note, as amended by this Amendment. All other terms and
      provisions of the Notes, including without limitation, the General Security
      Agreement dated July 11, 2007, as amended August 22, 2007, shall remain in
      full
      force and effect.

    

    4. Counterparts.
      This
      Amendment may be executed in one or more counterparts and by facsimile, and
      all
      of said counterparts taken together shall be deemed to constitute one and the
      same instrument.

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    5. Captions.
      The
      captions used in this Amendment are intended for convenience of reference only,
      shall not constitute any part of this Amendment and shall not modify or affect
      in any manner the meaning or interpretation of any of the provisions of this
      Amendment.

    

    6. Binding
      Effect.
      This
      Amendment shall be binding upon and inure to the benefit of the respective
      heirs, executors, administrators, representatives and the permitted successors
      and assigns of the parties hereto.

    

    7. Governing
      Law.
      This
      Amendment and the rights and obligations of the parties under this Amendment
      shall be governed by and construed in accordance with the laws of the State
      of
      New York, without regard to conflict of laws rules applied in such
      state.

    

    IN
      WITNESS WHEREOF, the parties have executed this Amendment to the Note as of
      the
      date first written above.

    

    
      	 	 	 
	 	
              KARAT
                PLATINUM LLC.

            
	 	 	 
	 	 	 
	 	 	 
	 	
              By:

            	
              /s/
                Gary M. Jacobs

            
	 	
              Name:

            	
              Gary
                M. Jacobs

            
	 	
              Title:

            	
              Chief
                Financial Officer and 

            
	 	 	
              Chief
                Operating Officer

            
	 	 	 
	 	 	 
	 	
              SENTRA
                CONSULTING CORP.

            
	 	 	 
	 	 	 
	 	 	 
	 	
              By:

            	
              /s/
                Philip Septimus

            
	 	
              Name:

            	
              Philip
                Septimus

            
	 	
              Title:

            	
              President

            

    

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

     

    Schedule
      1.1

    

    
      	
              Date
                of Issuance

            	
              Principal
                

              Amount

            	
              Original
                Payment 

              Date

            	
              Revised
                Payment 

              Date

            
	
              6/22/2007

            	
              $
                150,000.00

            	
              9/20/2007
                 

            	
              12/19/2007 
                

            
	
              6/29/2007

            	
              $
                450,000.00

            	
              9/27/2007
                 

            	
              12/26/2007 
                

            
	
              7/12/2007

            	
              $
                100,000.00

            	
               10/12/07 
                

            	
              1/10/08 
                

            
	
              7/16/2007

            	
              $
                260,000.00

            	
              10/16/2007 
                

            	
              1/14/2008 
                

            
	 	
              $
                960,000.00

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