On August 31, Crane Supply had an inventory of 20 backpacks at a cost of $18 each. The company uses a perpetual inventory system. During September, the following transactions and events occurred: Sep. 3 Purchased 45 backpacks at $20 each from Janzen, terms n/30. Received a 10% quantity discount. 6 Received credit of $72 for the return of four backpacks purchased on September 3 that were defective. 7 Paid for the September 3 purchase. 9 Sold 20 backpacks for $33 each to McGill Books, terms n/30. The cost of each backpack was $18 each. 13 Cash sales of 15 backpacks for $33 each to Calvin Office Supply. 21 Purchased 28 backpacks at $18 each from Coleman Company, terms 2/10, n/30. 30 A physical inventory count indicated an ending inventory balance of $790. Journalize the September transactions for Stanton Supply, using a perpetual inventory system