RESULTS OF OPERATIONS KWh Sales/Degree Days Summary of KWh Energy Sales Summary of Heating and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. (a) Heating degree days are calculated on a 55 degree temperature base. (b) Normal Heating/Cooling represents the thirty-year average of degree days. (c) Cooling degree days are calculated on a 70 degree temperature base. 133 Years Ended December 31, 2020 2019 2018 (in degree days) Actual – Heating (a) 189  301  354  Normal – Heating (b) 313  322  325  Actual – Cooling (c) 2,846  2,989  2,861  Normal – Cooling (b) 2,711  2,699  2,688  Years Ended December 31, 2020 2019 2018 (in millions of KWhs) Retail: Residential 12,163  11,996  12,101  Commercial 10,065  10,419  10,220  Industrial 9,085  8,882  9,053  Miscellaneous 636  665  646  Total Retail 31,949  31,962  32,020 