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 $38 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 10 units $24.00 cost 20 units 15 units $30.00 cost $32.00 cost QS 5-13 (Algo) 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. (Round your per unit costs to 2 decimal places.) December 7 Weighted Average - Perpetual: Goods purchased Cost of Goods Sold Inventory Balance Date # of # of units Cost per unit Inventory Value units Cost per Cost of Goods unit Sold Inventory # of units Cost per unit Balance sold $ 0.00 $ 0.00 December 14 Average cost December 14 December 15 December 21 Average cost December 21 Totals $ 0.00 $ 0.00 0 $ 0.00 $ 0.00