On July 10, 2020, Cheyenne Music sold CDs to retailers on account and recorded sales revenue of $752,000 (cost $609,120). Cheyenne grants the right to return CDs that do not sell in 6 months following delivery. Past experience indicates that the normal return rate is 15%. By October 11, 2020, retailers returned CDs to Cheyenne and were granted credit of $73,700. Prepare Cheyenne's journal entries to record (a) the sale on July 10, 2020, (b) $73,700 of returns on October 11, 2020, and (c) the journal entries at the end of the year