The amount of accounts receivable and accrued unbilled revenues under the sale of receivables agreement were: The fees paid to AEP Credit for customer accounts receivable sold were: The proceeds on the sale of receivables to AEP Credit were: December 31, Company 2020 2019 (in millions) APCo $ 136.0  $ 120.9  I&M 170.5  141.8  OPCo 398.8  330.3  PSO 85.0  101.1  SWEPCo 158.6  125.2  Years Ended December 31, Company 2020 2019 2018 (in millions) APCo $ 5.2  $ 7.4  $ 7.0  I&M 7.9  11.1  9.2  OPCo 24.1  27.1  26.3  PSO 4.8  7.8  7.9  SWEPCo 6.7  10.2  8.9  Years Ended December 31, Company 2020 2019 2018 (in millions) APCo $ 1,272.9  $ 1,310.3  $ 1,421.0  I&M 1,891.8  1,824.2  1,843.0  OPCo 2,366.2  2,293.6  2,674.5  PSO 1,221.0  1,442.5  1,484.6  SWEPCo 1,593.8  1,618.5  1,736.1  376