Table of Contents Index to Financial Statements Production, Average Sales Price and Average Production Cost The information regarding oil and gas production, production prices and production costs required by Item 1204 of Regulation S-K is set forth below: (1) The Fayetteville Shale E&P assets and associated reserves were sold December 3, 2018. (2) Approximately 240 Bcfe, 179 Bcfe and 148 Bcfe for the years ended December 31, 2018, 2017 and 2016, respectively, were produced from the Marcellus Shale formation. 43 For the years ended December 31, 2018 2017 2016 Natural Gas Production  (Bcf) : Northeast Appalachia 459  395  350  Southwest Appalachia 105  85  62  Fayetteville Shale  (1) 243  316  375  Other – 1  1  Total 807  797  788  Average realized gas price per Mcf, excluding derivatives: Northeast Appalachia $ 2.54  $ 2.11  $ 1.34  Southwest Appalachia 2.58  2.28  1.71  Fayetteville Shale  (1) 2.21  2.35  1.80  Total $ 2.45  $ 2.23  $ 1.59  Average realized gas price per Mcf, including derivatives $ 2.35  $ 2.19  $ 1.64  Oil Production  (MBbls) : Southwest Appalachia 3,355  2,228  2,041  Other 52  99  151  Total 3,407  2,327  2,192  Average realized oil price per Bbl, excluding derivatives: Southwest Appalachia $ 56.71  $ 42.93  $ 30.59  Other 62.01  47.38  39.44  Total $ 56.79  $ 43.12  $ 31.20  Average realized oil price per Bbl, including derivatives $ 56.07  $ 43.12  $ 31.20  NGL Production  (MBbls) : Southwest Appalachia 19,679  14,193  12,317  Other 27  52  55  Total 19,706  14,245  12,372  Average realized NGL price per Bbl, excluding derivatives: Southwest Appalachia $ 17.89  $ 14.42  $ 7.41  Other 28.12  26.38  17.33  Total $ 17.91  $ 14.46  $ 7.46  Average realized NGL price per Bbl, including derivatives $ 17.23  $ 14.48  $ 7.46  Total Production (Bcfe) Northeast Appalachia 459  395  350  Southwest Appalachia  (2) 243  183  148  Fayetteville Shale  (1) 243  316  375  Other 1  3  2  Total 946  897  875  Average Production Cost Cost per Mcfe, excluding ad valorem and severance taxes: Northeast Appalachia $ 0.81  $ 0.75  $ 0.76  Southwest Appalachia 1.08  1.07  1.05  Fayetteville Shale  (1) 0.98  0.97  0.89  Total $ 0.93  $ 0.90  $ 0.87 