9 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 $36 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 10 units @ $22.00 cost 20 units @ $28.00 cost 15 units @ $30.00 cost Determine the costs assigned to ending inventory when costs are assigned based on the LIFO method. Perpetual LIFO: Goods purchased Cost of Goods Sold Inventory Balance Date Cost of Goods # of units Cost per unit Available for Sale # of units sold Cost per Cost of Goods unit Sold # of units Cost per unit Inventory Balance December 7 December 14 Total December 14 December 15 Total December 15 December 21 Totals