All of Porter Corporation's sales are on account. Sixty percent of the credit sales are collected in the month of sale, 25% in the month following sale, and 10% in the second month following sale. The remainder are uncollectible. The following are budgeted sales data for the company:

	January	February	March	April
Total sales	$414,000	$646,000	$626,000	$798,000

Cash receipts in April are expected to be:

a. $478,800

b. $635,300

c. $699,900

d. $221,100