RESULTS OF OPERATIONS Summary of KWh Energy Sales KWh Sales/Degree Days Summary of Heating and Cooling Degree Days (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold into PJM. 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 65 degree temperature base. 188 Years Ended December 31, 2020 2019 2018 (in degree days) Actual – Heating (a) 2,743  3,071  3,357  Normal – Heating (b) 3,202  3,208  3,215  Actual – Cooling (c) 1,140  1,224  1,402  Normal – Cooling (b) 1,006  992  980  Years Ended December 31, 2020 2019 2018 (in millions of KWhs) Retail: Residential 14,355  14,411  14,940  Commercial 13,933  14,599  14,655  Industrial 13,347  14,407  14,857  Miscellaneous 113  114  115  Total Retail (a) 41,748  43,531  44,567  Wholesale (b) 1,859  2,335  2,441  Total KWhs 43,607  45,866  47,008 