Required information Use the following information for the Quick Study below........ Trey Monson starts a merchandising business on December 1 and enters into three inventory purchases: Purchases on December 7 Purchases on December 14 Purchases on December 21 10 units @ $ 6.00 cost 20 units e $12.00 cost 15 units . $14.00 cost QS 5-16A Periodic: Inventory costing with weighted average LO P3 Required: Monson sells 15 units for $20 each on December 15. Assume the periodic inventory system is used. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. (Amounts to be deducted should be indicated with a minus sign. Round cost per units to 2 decimals.) Periodic Weighted Average Inventory on hand Cost of Goods Sold # of units Cost per Inventory of units Avg.Cost per Cost of unit Value sold unit Goods Sold $ 0 0 Purchase - December 7 Purchase - December 14 Purchase - December 21 Available for Sale December Sales 0 . 0 Total $ 0 0 $ 0