b'Results of OperationsAll of our results, as presented in the table below, represent operations from the Jubilee and TENfields in Ghana, the U.S. Gulf of Mexico (commencing September 14, 2018, the DGE acquisition date),and our equity method investment offshore Equatorial Guinea. Certain operating results and statisticsfor the years ended December 31, 2018, 2017 and 2016 are included in the following tables:Year Ended December 31, 2018Equity MethodInvestment-EquatorialKosmos Guinea(1) Total(In thousands, except per volume data)Sales volumes:Oil (MBbl) . . . . . . . . . . . . . . . . . . . . 12,673 5,228 17,901Gas (MMcf) . . . . . . . . . . . . . . . . . . . 2,2682,268NGL (MBbl) . . . . . . . . . . . . . . . . . . 179179Total (MBoe) . . . . . . . . . . . . . . . . 13,230 5,228 18,458Revenues:Oil sales . . . . . . . . . . . . . . . . . . . . . . $874,382 $360,649 $1,235,031Average oil sales price per Bbl . . . . 69.00 68.98 68.99Gas sales . . . . . . . . . . . . . . . . . . . . . 7,1017,101Average gas sales price per Mcf . . . 3.133.13NGL sales . . . . . . . . . . . . . . . . . . . . 5,1835,183Average NGL sales price per Bbl . . 29.0028.96Costs:Oil and gas production, excludingworkovers . . . . . . . . . . . . . . . . . . . $217,818 $ 73,843 $ 291,661Oil and gas production, workovers . . . 6,9096,909Total oil and gas production costs . . $224,727 $ 73,843 $ 298,570Depletion and depreciation . . . . . . . . $329,835 $134,983 $ 464,818Average cost per Boe:Oil and gas production, excludingworkovers . . . . . . . . . . . . . . . . . . . $ 16.46 $ 14.12 $ 15.80Oil and gas production, workovers . . . 0.520.38Total oil and gas production costs . . 16.98 14.12 16.18Depletion and depreciation . . . . . . . . 24.93 25.82 25.18Oil and gas production cost anddepletion and depreciation costs . . . $ 41.91 $ 39.94 $ 41.36(1) For the year ended December 31, 2018, we have presented our 50% share of the resultsof operations, including our basis difference which is reflected in depletion anddepreciation. Under the equity method of accounting, we only recognize our share of thenet income of KTIPI as adjusted for our basis differential, which is recorded in (Gain)loss on equity method investments, net in the consolidated statement of operations.81'