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 $35 each. Purchases on December 7 10 units @ $21.00 cost Purchases on December 14 20 units @ $27.00 cost Purchases on December 21 15 units @ $29.00 cost Determine the costs assigned to ending inventory when costs are assigned based on the LIFO method.