Requirement 3. Prepare a perpetual inventory record for the merchandise inventory using the weighted-average inventory costing method. merchandise inventory purchased, sold, and on hand at the end of the period. Requirement 4. Determine the company's cost of goods sold for August using FIFO, LIFO, and weighted-average inventory costing methods. The cost of goods sold amount for August using FIFO inventory costing is The cost of goods sold amount for August using LIFO inventory costing is The cost of goods sold amount for August using weighted-average inventory costing is Requirement 3. Prepare a perpetual inventory record for the merchandise inventory using the weighted-average inventory costing method. merchandise inventory purchased, sold, and on hand at the end of the period. Requirement 4. Determine the company's cost of goods sold for August using FIFO, LIFO, and weighted-average inventory costing methods. The cost of goods sold amount for August using FIFO inventory costing is The cost of goods sold amount for August using LIFO inventory costing is The cost of goods sold amount for August using weighted-average inventory costing is