Date Description Units Purchased at cost Units Sold at Retail 1400 urits 112 Sept. Beginning inventory 10 Purchase 120 Sales 1600 units 514 1670 units 0 524 25 Purchase 1600 units atls151 Assume Tyler uses a perpetual Inventory system. Required: Calculate ending inventory and cost of goods sold using the FIFO, LIFO, and average cost methods. FIFO LIFO Avg Cost Cost of goods sold X . Ending inventory