Bigham Corporation, an accrual basis calendar year taxpayer, sells its services under 12-month and 24-month contracts. The corporation provides services to each customer every month. On July 1, 2018, Bigham sold the following customer contracts:

Length of contract	Total Proceeds
12 months	$20,800
24 months	$41,600

Determine the income to be recognized in taxable income in 2018 and 2019.

Length of Contract	2018 Income	2019 Income
12 months	$	$
24 months	$	$