Required: 1-a. Compute cost of goods sold under the FIFO, LIFO, and average cost inventory costing methods. 1-b. Prepare income statements under the FIFO, LIFO, and average cost inventory costing methods. Complete this question by entering your answers in the tabs below. Req 1A Req 1B Compute cost of goods sold under the FIFO, LIFO, and average cost inventory costing methods. (Do not round your intermediate calculations. Round your final answers to the nearest whole dollar amount.) Inventory Costing Method Cost of Goods Sold Units FIFO LIFO Average Cost Beginning inventory Purchases Goods available for sale 0 0 0 0 Ending inventory Cost of goods sold