Use the following information for the Quick Study below. 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 $12.00 cost 15 units e $14.00 cost QS 5-12 Perpetual: Inventory costing with weighted average LO P1 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. Weighted Average - Perpetual: Goods purchased Date # of Cost per Inventory units unit Value December 7 December 14 Cost of Goods Sold # of Cost per Cost of units unit Goods Sold sold Inventory Balance # of units Cost per Inventory unit Balance Average cont December 16 December 21 Average cost Totals