Determine the cost of goods sold and ending merchandise inventory by preparing a perpetual inventory record using the specific identification method. Assume the following costing information for the books sold during the month: August 3: 10 books costing $ 18 each August 15: 4 books costing $ 18 each and 9 books costing $ 21 each August 28: 2 books costing $ 21 each and 2 books costing $ 28 each b. Determine the cost of goods sold and ending merchandise inventory by preparing a perpetual inventory record using the FIFO inventory costing method. c. Determine the cost of goods sold and ending merchandise inventory by preparing a perpetual inventory record using the LIFO inventory costing method. d. Determine the cost of goods sold and ending merchandise inventory by preparing a perpetual inventory record using the weighted-average inventory costing method. Round weighted average unit cost to the nearest cent and total cost to the nearest dollar.