Cullumber Corp. uses a perpetual inventory system. The company had the following inventory transactions in April: April 3 Purchased merchandise from Riverbed Ltd. for $35,840, terms n/30, FOB shipping point. 6 The appropriate company paid freight costs of $896 on the merchandise purchased on April 3. 7 Purchased supplies on account for $6,400. 8 Returned merchandise to Riverbed and received a credit of $4,480. The merchandise was returned to inventory for future resale. 30 Paid the amount due to Riverbed in full. 1. The cost of the merchandise sold on April 3 was $24,320. Riverbed expected a return rate of 15%. 2. The cost of the merchandise returned on April 8 was $2,944. 3. Riverbed uses a perpetual inventory system. Record the transactions in the books of Riverbed. (List all debit entries before credit entries. Credit account titles are automatically indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Record the transactions in the books of Riverbed. (List all debit entries before credit entries. Credit account titles are automatically indented