Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15 , Monson sells 15 units for $20 each. S 5-13 (Static) Perpetual: Inventory costing with weighted average LO P1 QS 5-13 (Static) Perpetual: Inventory costing with weighted average LO P1 Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. Note: Round your per unit costs to 2 decimal places