cass company enters into a contract with dearborn inc. to sell it $50,000 of goods with delivery on may 10, 2019. cass manufactured the goods at a cost of $33,000. the contract is signed on april 15, 2019, at which time dearborn pays cass $25,000. cass delivers the goods on may 10, 2019, and dearborn pays the final $25,000 on that date.