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 $23 each. Purchases on Decenber 710 units e $9.00 cost Purchases on Decenber 1420 units $15,00 cost Purchases on December 2115 units @$17.00 cost Determine the costs assigned to ending inventory when costs are assigned based on the LIFO method