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STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010
Operating revenues |  |  |  |
Municipalities and cooperatives | $ 2,287 | $ 2,204 | $ 7,190 | $ 6,367
Industries directly served | 310 | 324 | 1,077 | 1,019
Federal agencies and other | 31 | 31 | 95 | 83
Other revenue | 29 | 28 | 91 | 89
Total operating revenues | 2,657 | 2,587 | 8,453 | 7,558
Operating expenses |  |  |  |
Fuel | 584 | 509 | 2,071 | 1,343
Purchased power | 387 | 277 | 1,026 | 656
Operating and maintenance | 994 | 757 | 2,677 | 2,267
Depreciation and amortization | 436 | 416 | 1,296 | 1,240
Tax equivalents | 174 | 114 | 464 | 320
Total operating expenses | 2,575 | 2,073 | 7,534 | 5,826
Operating income | 82 | 514 | 919 | 1,732
Other income (expense), net | 4 | 6 | 25 | 20
Interest expense |  |  |  |
Interest expense | 358 | 343 | 1,072 | 1,026
Allowance for funds used during construction and nuclear fuel expenditures | (32) | (22) | (93) | (53)
Net interest expense | 326 | 321 | 979 | 973
Net income (loss) | $ (240) | $ 199 | $ (35) | $ 779

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