last attempt i want correct answr please

On September 1, the beginning of its fiscal year, Blossom Ltd. had an inventory of 124 calculators at a cost of $20 each. The company uses a perpetual inventory system. During September, the following transactions occurred: Sept. 2 Purchased 930 calculators for $20 each from Digital Corp. on account, terms n/30. 10 Returned 30 calculators to Digital for $600 credit because they did not meet specifications. 11 Sold 430 calculators for $30 each to Campus Book Store, terms n/30. Management estimates returns of 4% based on prior experience. 14 Granted credit of $900 to Campus Book Store for the return of 30 calculators that were not ordered. The calculators were restored to inventory. 29 Paid Digital the amount owing. 30 Received payment in full from the Campus Book Store. pt. 11 Accounts Receivable 12900 Sales 12390 Estimated Inventory Returns (To record credit sale) pt. 11 Cost of Goods Sold 8260 Estimated Inventory Returns Inventory (To record cost of merchandise sold) ept. 14 Cost of Goods Sold 900 Accounts Receivable (To record return of goods) ept 14 Inventory 600 900 Cost of Goods Sold (To record cost of merchandise returned)