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 30 units for $40 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 20 units @ $16.00 cost 35 units @ $24.00 cost 30 units @ $29.00 .cost QS 5-12 Perpetual: Inventory costing with weighted average LO P1 Required: Monson sells 30 units for $40 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. (Round your per unit costs to 2 decimal places.)