On september 1, Pennington Supply had an inventory of 20 backpacks at a cost of $25 each. The company uses a perpetual inventory system. During September, the following transactions and events occured:
Sept. 4 Purchased 40 backpacks at $25 each from Sievert, terms 2/10, n/30.
Sept. 6 Received credit of $100 for the return of 4 backpacks purchased on Sept. 4 that were defective.
Sept. 9 Sold 20 backpacks for $40 each to Lilly Books, terms 2/10, n/30.
Sept. 13 Gave credit to Lilly Books for 2 backpacks that were returned.
Sept. 14 Paid Sievert in full, less discount.
Journalize the September transactions for Pennington Supply.