Other operating expenses increased by $2.570 billion, or 18.5%, for the year, largely due to the acquisitions mentioned above, as well as increases in fuel expense and purchased transportation.
The table below indicates the impact of business acquisitions completed in 2005 on the increase in operating expenses by category in 2006.
## Table 0 ##
Excluding the effect of acquisitions, the 20.2% increase in fuel expense for the year was impacted by higher prices for jet-A, diesel and unleaded gasoline as well as higher usage, but was partially mitigated by hedging gains.
The 30.1% increase in purchased transportation was influenced by volume growth in our International Package business, currency fluctuations, higher fuel prices, increased rail costs, and changes to the freight forwarding business model described previously.
The 2.3% increase in repairs and maintenance was largely due to increased expense on airframe and engine repairs.
The 3.2% increase in depreciation and amortization for the year was caused primarily by higher depreciation expense on plant equipment, aircraft and engines, and higher amortization expense on intangible assets.
The 3.4% increase in other occupancy expense was largely due to higher electricity and other utilities expenses.
The increase in other expenses was impacted by several items, including the $87 million tentative settlement of a class action litigation (see “Contingencies” section below).
Investment Income and Interest Expense 2007 compared to 2006 The increase in investment income of $13 million was primarily due to higher realized gains on sales of investments, but partially offset by a lower average balance of interest-earning investments and increased equitymethod losses on investment partnerships.
Interest expense increased $35 million in 2007, primarily due to higher average debt balances outstanding, largely related to commercial paper.
Our commercial paper balances increased in the fourth quarter of 2007, causing a corresponding increase in interest expense, as a result of the payment made to withdraw from the Central States Pension Fund.
Increased interest charges were somewhat offset, however, by higher capitalized interest related to various construction projects, including aircraft purchases and our Worldport expansion.2006 compared to 2005 The decrease in investment income of $18 million during the year was primarily due to a lower average balance of interest-earning investments, due to the timing of cash payments for pension fundings, business acquisitions, and capital expenditures.
This was partially offset by a higher average interest rate earned on investments, as well as the absence of any investment impairments during 2006 ($16 million of investment impairments were recognized in 2005, as described below).
The $39 million increase in interest expense during the year was primarily due to higher average interest rates on variable rate debt and interest rate swaps, as well as interest expense incurred on debt related to real estate investment partnerships.
This was partially offset by slightly lower average debt balances during 2006, as well as higher capitalized interest due to large aircraft contract deposit payments made during the year.
providing a revolving credit facility of $7.0 billion and expiring on October 17, 2008.
Interest on any amounts we borrow under these facilities would be charged at 90-day LIBOR plus 15 basis points.
At December 31, 2007, there were no outstanding borrowings under these facilities.
Our existing debt instruments and credit facilities do not have cross-default or ratings triggers, however these debt instruments and credit facilities do subject us to certain financial covenants.
Covenants in our credit facilities generally require us to maintain a $3.0 billion minimum net worth and limit the amount of secured indebtedness that may be incurred by the company.
The notes issued in January 2008 include limitations on secured indebtedness and on sale-leaseback transactions.
These covenants are not considered material to the overall financial condition of the company, and all applicable covenant tests were satisfied as of December 31, 2007.
Commitments We have contractual obligations and commitments in the form of capital leases, operating leases, debt obligations, purchase commitments, and certain other liabilities.
We intend to satisfy these obligations through the use of cash flow from operations.
The following table summarizes the expected cash outflow to satisfy our contractual obligations and commitments as of December 31, 2007 (in millions):
## Table 1 ##
Our capital lease obligations relate primarily to leases on aircraft.
Capital leases, operating leases, and purchase commitments, as well as our debt principal obligations, are discussed further in Note 8 to our consolidated financial statements.
The amount of interest on our debt was calculated as the contractual interest payments due on our fixed-rate debt, in addition to interest on variable rate debt that was calculated based on interest rates as of December 31, 2007.
The calculations of debt interest do not take into account the effect of interest rate swap agreements.
The maturities of debt principal and interest include the effect of the January 2008 issuance of $4.0 billion in senior notes that were used to reduce the commercial paper balance.
Purchase commitments represent contractual agreements to purchase goods or services that are legally binding, the largest of which are orders for aircraft, engines, and parts.
In February 2007, we announced an order for 27 Boeing 767-300ER freighters to be delivered between 2009 and 2012.
We also have firm commitments to purchase nine Boeing 747-400F aircraft scheduled for delivery between 2008 and 2010, and two Boeing 747-400BCF aircraft scheduled for delivery during 2008.
These aircraft purchase orders will provide for the replacement of existing capacity and anticipated future growth.
In July 2007, we formally cancelled our previous order for ten Airbus A380-800 freighter aircraft, pursuant to the provisions of an agreement signed with Airbus in February 2007.
As a result of our cancellation of the Airbus A380-800 order, we received cash in July 2007 representing the return of amounts previously paid to Airbus as purchase contract deposits and accrued interest on those balances.
Additionally, we received a credit memorandum to be used by UPS for the purchase of parts and services from Airbus.
The cancellation of the Airbus order did not have a material impact on our financial condition, results of operations, or liquidity.
UNITED PARCEL SERVICE, INC.  AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) Deferred Compensation Obligations and Treasury Stock We maintain a deferred compensation plan whereby certain employees were previously able to elect to defer the gains on stock option exercises by deferring the shares received upon exercise into a rabbi trust.
The shares held in this trust are classified as treasury stock, and the liability to participating employees is classified as “deferred compensation obligations” in the shareowners’ equity section of the balance sheet.
The number of shares needed to settle the liability for deferred compensation obligations is included in the denominator in both the basic and diluted earnings per share calculations.
Employees are generally no longer able to defer the gains from stock options exercised subsequent to December 31, 2004.
Activity in the deferred compensation program for the years ended December 31, 2007, 2006, and 2005 is as follows (in millions):
## Table 2 ##
UNITED PARCEL SERVICE, INC.  AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) Deferred Compensation Obligations and Treasury Stock We maintain a deferred compensation plan whereby certain employees were previously able to elect to defer the gains on stock option exercises by deferring the shares received upon exercise into a rabbi trust.
The shares held in this trust are classified as treasury stock, and the liability to participating employees is classified as “deferred compensation obligations” in the shareowners’ equity section of the balance sheet.
The number of shares needed to settle the liability for deferred compensation obligations is included in the denominator in both the basic and diluted earnings per share calculations.
Employees are generally no longer able to defer the gains from stock options exercised subsequent to December 31, 2004.
Activity in the deferred compensation program for the years ended December 31, 2007, 2006, and 2005 is as follows (in millions):
UNITED PARCEL SERVICE, INC.  AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) management incentive awards generally vest over a five year period with approximately 20% of the award vesting at each anniversary date of the grant.
The entire grant is expensed on a straight-line basis over the requisite service period.
All RSUs granted are subject to earlier cancellation or vesting under certain conditions.
Dividends earned on management incentive award RSUs are reinvested in additional RSUs at each dividend payable date.
We also award RSUs in conjunction with our long-term incentive performance awards program to certain eligible employees.
The RSUs ultimately granted under the long-term incentive performance award will be based upon the achievement of certain performance measures, including growth in consolidated revenue and operating return on invested capital, each year during the performance award cycle, and other measures, including growth in consolidated earnings, over the entire three year performance award cycle.
As of December 31, 2007, we had the following RSUs outstanding, including reinvested dividends:

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td>Total % Increase</td><td>Acquisition Impact</td><td> % Increase without Acquisitions</td></tr><tr><td>Other Operating Expenses:</td><td></td><td></td><td></td></tr><tr><td>Repairs and maintenance</td><td>5.3%</td><td>3.0%</td><td>2.3%</td></tr><tr><td>Depreciation and amortization</td><td>6.3%</td><td>3.1%</td><td>3.2%</td></tr><tr><td>Purchased transportation</td><td>34.9%</td><td>4.8%</td><td>30.1%</td></tr><tr><td>Fuel</td><td>27.3%</td><td>7.1%</td><td>20.2%</td></tr><tr><td>Other occupancy</td><td>7.6%</td><td>4.2%</td><td>3.4%</td></tr><tr><td>Other expenses</td><td>8.5%</td><td>3.9%</td><td>4.6%</td></tr><tr><td></td><td>18.5%</td><td>4.5%</td><td>14.0%</td></tr></table>
<table><tr><td>Year</td><td>Capital  Leases</td><td>Operating  Leases</td><td>Debt  Principal</td><td>Debt  Interest</td><td>Purchase  Commitments</td><td>Pension  Fundings</td><td>Other  Liabilities</td></tr><tr><td>2008</td><td>$108</td><td>$378</td><td>$3,426</td><td>$329</td><td>$1,306</td><td>$101</td><td>$78</td></tr><tr><td>2009</td><td>73</td><td>325</td><td>83</td><td>384</td><td>791</td><td>824</td><td>74</td></tr><tr><td>2010</td><td>91</td><td>237</td><td>40</td><td>380</td><td>729</td><td>630</td><td>71</td></tr><tr><td>2011</td><td>31</td><td>166</td><td>33</td><td>379</td><td>698</td><td>717</td><td>69</td></tr><tr><td>2012</td><td>31</td><td>116</td><td>26</td><td>377</td><td>304</td><td>859</td><td>67</td></tr><tr><td>After 2012</td><td>285</td><td>560</td><td>6,919</td><td>6,177</td><td>—</td><td>334</td><td>203</td></tr><tr><td>Total</td><td>$619</td><td>$1,782</td><td>$10,527</td><td>$8,026</td><td>$3,828</td><td>$3,465</td><td>$562</td></tr></table>
<table><tr><td></td><td colspan="2">2007</td><td colspan="2">2006</td><td colspan="2">2005</td></tr><tr><td></td><td>Shares</td><td>Dollars</td><td>Shares</td><td>Dollars</td><td>Shares</td><td>Dollars</td></tr><tr><td> Deferred Compensation Obligations</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of year</td><td></td><td>$147</td><td></td><td>$161</td><td></td><td>$169</td></tr><tr><td>Reinvested dividends</td><td></td><td>4</td><td></td><td>4</td><td></td><td>4</td></tr><tr><td>Option exercise deferrals</td><td></td><td>—</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Benefit payments</td><td></td><td>-14</td><td></td><td>-18</td><td></td><td>-12</td></tr><tr><td>Balance at end of year</td><td></td><td>$137</td><td></td><td>$147</td><td></td><td>$161</td></tr><tr><td> Treasury Stock</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of year</td><td>-3</td><td>$-147</td><td>-3</td><td>$-161</td><td>-3</td><td>$-169</td></tr><tr><td>Reinvested dividends</td><td>—</td><td>-4</td><td>—</td><td>-4</td><td>—</td><td>-4</td></tr><tr><td>Option exercise deferrals</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Benefit payments</td><td>1</td><td>14</td><td>—</td><td>18</td><td>—</td><td>12</td></tr><tr><td>Balance at end of year</td><td>-2</td><td>$-137</td><td>-3</td><td>$-147</td><td>-3</td><td>$-161</td></tr></table>

Question: What's the sum of all Balance at end of year that are positive in 2006 for dollars?
Answer: 165
Reasoning program: add(161,4)