Required information Trey Monson starts a merchandising business on December 1 and enters into three inventory purchases: Purchases on December 7 Purchases on December 14 35 units $15.00 cost Purchases on December 21 28units$18.00 cost 18 units $10.00 cost Required: Monson sells 28 units for $25 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.) eriodic Weighted Average Inventory on hand Cost of Goods Sold Cost per unit Inventory | # of units Value sold , cost per unit Goods Sold Cost of # of units Purchase December 7 Purchase-December 14 Purchase-December 21 Available for Sale December Sales Total