The December 31, Year 4, balance sheet for Burdette Corporation is presented here. These are the only accounts on Burdette's balance sheet. Amounts indicated by question marks (?) can be calculated using the following additional information. BURDETTE CORPORATION Balance Sheet As of December 31, Year 4 Assets Cash Accounts receivable (net) Inventory Property, plant, and equipment (net) $30,000 ? 352,800 $518,400 Liabilities and Stockholders' Equity Accounts payable (trade) Income taxes payable (current) Long-term debt Common stock Retained earnings $? 30,000 ? 360,000 ? $? Additional Information Current ratio (at year end) Total liabilities - Total stockholders' equity Gross margin percentage Inventory turnover (Cost of goods sold - Ending inventory) Gross margin for Year 4 1.5 to 1.0 80% 30% 10.5 times $378,000 a. Compute the balance in trade accounts payable as of December 31, Year 4. b. Compute the balance in retained earnings as of December 31, Year 4. C. Compute the balance in the inventory account as of December 31, Year 4. (Assume that the level of inventory did not change from last year.) (For all requirements, negative amounts should be indicated by a minus sign.) a. Accounts payable Retained earnings b. C. Inventory