Bigham Corporation, an accrual basis calendar year taxpayer, sells its services under 12- and 24-month contracts. The corporation provides services to each customer every month. On July 1, 2020, Bigham sold the following customer contracts: Length of contract Total Proceeds 12 months $44,800 24 months $89,600 Determine the income to be recognized in taxable income in 2020 and 2021.