Inventory Costing Methods Tyler Company has the following information related to purchases and sales of one of its inventory.items. Date Description Units Purchased at Cost Units Sold at Retail Beginning inventory 400 units @ $10 600 units @ $11 Purchase Sept. 1 Sept. 10 Sept. 20 Sept. 25 Sales 620 units @ $19 Purchase 600 units at $13 Assume the company 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 Ending inventory