On September 1, the beginning of its fiscal year, Campus Office Supply Ltd. had an inventory of 126 calculators at a cost of $20 each. The company uses a perpetual inventory system. During September, the following transactions occurred: Sept. 2 Purchased 945 calculators for $20 each from Digital Corp. on account, terms n/30. Returned 31 calculators to Digital for $620 credit because they did not meet specifications. 10 11 14 29 22 Sold 440 calculators for $30 each to Campus Book Store, terms n/30. Management estimates returns of 4% based on prior experience. Granted credit of $930 to Campus Book Store for the return of 31 calculators that were not ordered. The calculators were restored to inventory. Paid Digital the amount owing. 30 Received payment in full from the Campus Book Store. Create T accounts for the Inventory and Cost of Goods Sold accounts. Enter the opening balances and post the September transactions. (Post entries in the order presented in the problem) Sept. 1 Bal. Sept. 2 Sept. 14 Inventory 2520 Sept. 10 620 18900 Sept. 11 8800 620 Sept. 30 Bal. 12620 Sept. 11 Cost of Goods Sold Sept. 30 Bal.