Need help finding avg. cost

Brief Exercise 6-35 (Algorithmic) Inventory Costing Methods Tyler Company has the following information related to purchases and sales of one of ts inventory items. Date Description Sept. 1 Beginning inventory 400 units @$13 Sept. 10 Purchase Sept. 20 Sales Sept. 25 Purchase Assume the company uses a perpetual inventory system Required: Units Purchased at Cost Units Sold at Retail 600 units $15 660 units @ $26 800 units at $16 Calculate ending inventory and cost of goods sold using the FIFO, LIFO, and average cost methods. FIFO LIFO Avg Cost Cost of goods sold 9,100 9,780 v 17,900] 17,220] v ?Check My Work nld or ending inventory. Apply the following steps