The following tables quantify the significant unobservable inputs used in developing the fair value of Level 3 positions: 345 Significant Input/Range Fair Value Valuation Unobservable Weighted Assets Liabilities Technique Input Low High Average (in millions) Energy Contracts $ 213.5  $ 169.7  Discounted Cash Flow Forward Market Price (a) (c) $ 5.33 $ 100.47  $ 32.73 Natural Gas Contracts —  1.7  Discounted Cash Flow Forward Market Price (b) (c) 2.18 2.77 2.40 FTRs 42.8  3.4  Discounted Cash Flow Forward Market Price (a) (c) (15.08) 9.66 0.19 Other Investments 31.8  —  Black-Scholes Model Liquidity Adjustment (d) 10  % 20  % 15  % Total $ 288.1  $ 174.8  Significant Input/Range Fair Value Valuation Unobservable Weighted Assets Liabilities Technique Input Low High Average (c) (in millions) Energy Contracts $ 296.7  $ 249.3  Discounted Cash Flow Forward Market Price (a) $ (0.05) $ 177.30  $ 31.31  Natural Gas Contracts —  4.9  Discounted Cash Flow Forward Market Price (b) 1.89  2.51  2.19  FTRs 75.7  8.3  Discounted Cash Flow Forward Market Price (a) (8.52) 9.34  0.42  Total $ 372.4  $ 262.5  December 31, 2020 December 31, 2019 AEP