On June 24, 2003, Mowen Company sold merchandise to Jack Simpson for $80,000 with terms 2/10, n/30. On June 30, Simpson paid $39,200, receiving the cash discount on his payment, and returned $16,000 of merchandise, claiming that it did not meet contract terms. Assuming that Mowen Company uses the periodic inventory method, record the neces- sary journal entries on June 24 and June 30.