Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Also on December 15, Monson sells 28 units for $45 each Purchases on December Purchases on December 14 Purchases on December 21 18 units & 518.00 cost 32 units $27.00 cost 28 units $32.ee cost QS 5-12 Perpetual: Inventory costing with weighted average LO P1 Required: Monson sells 28 units for $45 each on December 15. Monson uses a perpetual inventory system. Determine the costs assigned to ending inventory when costs are assigned based on the welghted average method. (Round your per unlt costs to 2 decimal places.) Weighted Average - Perpetual: Sondsurchased #of Cost per Inventory Date unit Value Cost of Goods Sold of units Cost of unit sold Goods Sold Cost per Inventory Balance Cost per # of units Inventory unit Balance December 7 December 14 Average com December 15 December 21 Weighted Average . Perpetual: Goods purchased of Inventory Date units unit Value Cost per Cost of Goods Sold #of Cost per units Cost of unit sold Goods Sold Inventory Balance Inventory of units unit Balance Cost per December 7 December 14 Average cost December 15 December 21 Average cost Total