Required information Skip to question [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 periodic inventory system. Also, on December 15, Monson sells 15 units for $50 each. Purchases on December 7 8 units @ $20.00 cost Purchases on December 14 17 units @ $30.00 cost Purchases on December 21 15 units @ $36.00 cost Of the units sold, 6 are from the December 7 purchase and 4 are from the December 14 purchase. Determine the costs assigned to ending inventory when costs are assigned based on specific identification.