Purchases on December 20 units @ $10.00 cost Purchases on December 14 Purchases on December 36 units @ $15.00 cost 21 30 units @ $18.00 cost QS 5-12 Perpetual: Inventory costing with weighted average LO P11 Required: Monson sells 30 units for $25 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.) Weighted Average - Perpetual: Goods purchased # of Cost per Inventory Date units unit Value Inventory Balance Cost of Goods Sold #of Cost per cost of sold unit Goods Sold of units Cost per unit Inventory Balance December 7 December 14 Average cost December 15 December 21