2-48 Finding unknown amounts. An auditor for the Internal Revenue Service is trying to reconstruct some partially destroyed records of two taxpayers. For each of the cases in the accompanying list, find the unknowns designated by the letters A and B for Case 1 and C and D for Case 2. Accounts receivable, 12/31 Cost of goods sold Accounts payable, 1/1 Accounts payable, 12/31 Finished-goods inventory, 12/31 Gross margin Work-in-process inventory, 1/1 Work-in-process inventory, 12/31 Finished-goods inventory, 1/1 Direct materials used Direct manufacturing labor Manufacturing overhead costs Purchases of direct materials Revenues Accounts receivable, 1/1 Case 1 Case 2 (in thousands) $ 8,000 $ 3,150 A 31,800 4,500 2,550 2,700 2,250 B 7,000 18,000 3,000 1,500 4,700 5,000 7,000 13,000 19,000 4,500 8,500 9,500 13,500 10,500 52,000 52,300 3,000 2,100 0