On December 30, Devlin Co. sold goods to Jensen Co. for $10,000, under an arrangement in which (1) Jensen has an unlimited right of return and (2) Jensen's obligation to pay Devlin is contingent upon Jensen's reselling the goods. Past experience has shown that Jensen ordinarily resells 60% of goods and returns the other 40%. What amount should Devlin include in sales revenue for this transaction on its December 31 income statement? $10,000 $6,000 O $4,000 $0