On September 1, the beginning of its fiscal year, Campus Office Supply Ltd. had an inventory of 96 calculators at a cost of $20 each. The company uses a perpetual inventory system. During September, the following transactions occurred: Sept. 2 10 11 Purchased 720 calculators for $20 each from Digital Corp. on account, terms n/30. Returned 16 calculators to Digital for $320 credit because they did not meet specifications. Sold 290 calculators for $30 each to Campus Book Store, terms n/30. Management estimates returns of 4% based on prior experience. Granted credit of $480 to Campus Book Store for the return of 16 calculators that were not ordered. The calculators were restored to inventory. Paid Digital the amount owing. 14 29 30 Received payment in full from the Campus Book Store. Record the September transactions. (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 for the amounts.) Date Account Titles and Explanation Debit Credit