Ube Trey Monscht starts a merchandising business on December and enters into the following three inventory purchases Also, on December 15, Monson sells 15 units for $20 each Purchases on December Purchases on December 14 Purchases on December 21 10 units $6.00 cost 20 units $12.00 cost 15 units 514,00 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 10 ending inventory When costs are assigned based on the weighted average method