Required information [The following information applies to the questions displayed below] Trey Monson starts a merchondising business on December 1 and enters into the following three inventory purchases. Monson uses o perpetual inventory system. Also, on December 15 . Monson sells 15 units for $28 eoch. Purchoses on Decenber 7 Purchases on Decenber 14 Purchases on December 21 10 units 8.514 .00 cost 20 units e $20.00 cost 15 units es \$22.00 cost Determine the costs assigned to ending inventory when costs are assigned based on the LIFO method