Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purc Also, on December 15, Monson sells 28 units for $45 each. Purchases on December 7 Purchases on December 14 18 units @ $18.00 cost 32 units @ $27.00 cost Purchases on December 21 28 units @ $32.00 cost QS 6-11 Perpetual: Inventory costing with LIFO LO P1 Required: Monson sells 28 units for $45 each on December 15. Monson uses a perpetual inventory system. Determine the costs a December 31 ending inventory when costs are assigned based on LIFO.