Requlred Information [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 26 units for $25 each. Of the units sold, 13 are from the December 7 purchase and 13 are from the December 14 purchase. Determine the costs assigr to ending inventory when costs are assigned based on specific identification