please help and explain!

Inventory Costing: Average Cost Filimonov Inc. has the following information related to purchases and sales of one of its inventory items: Date Description Units Sold at Retail. Units Purchased at Cost 200 units@ $10-$2,000. June 1 Beginning Inventory 9 Purchase 11 300 units $12- $3,600- 14 Sale 1 400 units @ $25 22 Purchase 2 250 units $14- $3,500 29 Sale 2 225 units @ $25 Assume that the company uses a perpetual inventory system.. Required: Calculate the cost of goods sold and the cost of ending inventory using the average cost method. (Note: Use four decimal places for per-unit calculations and round all other numbers to the nearest dollar.) Cost of goods sold Cost of ending inventory