Determine how much income should be recognized in 2020 and 2021. Sandy Corporation, an accrual basis calendar year taxpayer, sells its services under 12-months, 24-months, and 36-month contracts. The corporation provides services to each customer every month. On September 1, 2020, Sandy Corporation sold the following customer contracts: Length of contract Total proceeds 12 Months $4,800 24 Months $3,600 36 Months $6,000