Required information Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Also, on December 15, Monson sells 15 units for $20 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 10 units @$ 6.00 cost 20 units 15 units $12.00 cost $14.00 cost Required: Monson sells 15 units for $20 each on December 15. Monson uses a perpetual inventory system. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method Answer is complete but not entirely correct. Weighted Average Perpetual: Goods purchased Cost of Goods Sold Inventory Balance