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(i) Net is the Corporation's working interest (operating and non-operating) share after deduction of royalty obligations, plus the Corporation's royalty interests in production or reserves.
NET PRESENT VALUES OF FUTURE NET REVENUE -------------------------------------------------------COMPANY TOTAL BEFORE INCOME TAXES-------------------- DISCOUNTED AT (% per year) 0 5 10 15 20RESERVES CATEGORY (MM$) (MM$) (MM$) (MM$) (MM$)---------------------------------------------------------------------------PROVED Producing 6.45 5.87 5.42 5.06 4.76 Non-producing 0.75 0.76 0.73 0.68 0.63 Undeveloped 1.46 1.13 0.87 0.65 0.47---------------------------------------------------------------------------TOTAL PROVED 8.66 7.76 7.02 6.39 5.86PROBABLE 8.29 6.48 5.14 4.15 3.40---------------------------------------------------------------------------TOTAL PROVED PLUS PROBABLE 16.95 14.24 12.16 10.54 9.26--------------------------------------------------------------------------- NET PRESENT VALUES OF FUTURE NET REVENUE --------------------------------------------------------COMPANY TOTAL AFTER INCOME TAXES-------------------- DISCOUNTED AT (% per year) 0 5 10 15 20RESERVES CATEGORY (MM$) (MM$) (MM$) (MM$) (MM$)----------------------------------------------------------------------------PROVED Producing 6.45 5.87 5.42 5.06 4.76 Non-producing 0.75 0.76 0.73 0.68 0.63 Undeveloped 1.46 1.13 0.87 0.65 0.47----------------------------------------------------------------------------TOTAL PROVED 8.66 7.76 7.02 6.39 5.86PROBABLE 8.29 6.48 5.14 4.15 3.40----------------------------------------------------------------------------TOTAL PROVED PLUS PROBABLE 16.95 14.24 12.16 10.54 9.26----------------------------------------------------------------------------Pricing Used in Evaluation SUMMARY OF PRICING AND INFLATION RATE ASSUMPTIONS AS OF DECEMBER 31, 2012 FORECAST PRICES AND COSTS OIL NATURAL GAS ----------------------------------------------------- WTI Edmonton Bow River Cushing Light Hardisty AECO NYMEX Inflation Exchange Oklahoma Par Price Par Price Gas Price Gas PriceYEAR Rate Rate ($US/bbl) ($Cdn/bbl) ($Cdn/bbl) ($Cdn/Mcf) ($US/Mcf)----------------------------------------------------------------------------2013 2.0% 1.000 92.50 87.50 75.30 3.35 3.752014 2.0% 1.000 92.50 90.50 77.80 3.85 4.302015 2.0% 1.000 93.60 92.60 79.60 4.35 4.852016 2.0% 1.000 95.50 94.50 81.30 4.70 5.252017 2.0% 1.000 97.40 96.40 82.90 5.10 5.702018 2.0% 1.000 99.40 98.30 84.50 5.45 6.102019 2.0% 1.000 101.40 100.30 86.30 5.55 6.202020 2.0% 1.000 103.40 102.30 88.00 5.70 6.352021 2.0% 1.000 105.40 104.30 89.70 5.80 6.452022 2.0% 1.000 107.60 106.50 91.60 5.90 6.602023 2.0% 1.000 109.70 108.50 93.30 6.00 6.702024 2.0% 1.000 111.90 110.70 95.20 6.15 6.852025 2.0% 1.000 114.10 112.90 97.10 6.25 7.002026 2.0% 1.000 116.40 115.20 99.10 6.35 7.102027 2.0% 1.000 118.80 117.50 101.10 6.50 7.25After +2%/yr +2%/yr +2%/yr +2%/yr +2%/yr +2%/yr +2%/yr----------------------------------------------------------------------------



