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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Revenues |  |
Realized (loss) on derivative instruments, net | $ (1,371) | $ (4,095)
Unrealized (loss) gain on derivative instruments | (2,777) | 5,330
Other income | 84 | 198
Total Revenues | 104,824 | 118,100
Costs and Expenses |  |
Lease operating expense | 33,461 | 34,996
Field service expense | 15,446 | 14,475
Depreciation, depletion, amortization and accretion on discounted liabilities | 36,156 | 37,729
General and administrative expense | 15,639 | 13,550
Total Costs and Expenses | 100,702 | 100,750
Gain on Sale and Exchange of Assets | 4,574 | 3,662
Income from Operations | 8,696 | 21,012
Other Income and Expenses |  |
Less: Interest expense | 3,635 | 3,413
Add: Interest income | 19 | 44
Income Before Provision for Income Taxes | 5,080 | 17,643
Provision for Income Taxes | 1,421 | 2,978
Net Income | 3,659 | 14,665
Less: Net Income Attributable to Non-Controlling Interest | 183 | 136
Net Income Attributable to PrimeEnergy | $ 3,476 | $ 14,529
Basic Income Per Common Share | $ 1.72 | $ 6.96
Diluted Income Per Common Share | $ 1.25 | $ 5.11
Oil sales [Member] |  |
Revenues |  |
Oil, gas and service income | $ 68,366 | $ 71,766
Natural gas sales [Member] |  |
Revenues |  |
Oil, gas and service income | 6,539 | 8,590
Natural gas liquids sales [Member] |  |
Revenues |  |
Oil, gas and service income | 9,110 | 12,859
Oil and gas service [Member] |  |
Costs and Expenses |  |
Field service expense | 19,214 | 17,732
Administrative Service [Member] |  |
Revenues |  |
Oil, gas and service income | $ 5,659 | $ 5,720

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