Required information [The following information applies to the questions displayed below.) 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 23 units for $30 each. Purchases on December 7 13 units $12.00 cost Purchases on December 14 30 units $18.00 cost Purchases on December 21 23 units $22.00 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 Cost of Goods #of of units unit Available for units Cost per Cost of Goods Sale unit sold Sold Inventory Balance Date Cost per Cost per #of units unit Inventory Balance December 7 December 14 Total December 14 December 15 Total December 15 December 21 Totals