Required information The following information applies fo 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 28 units for $50 each. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. (Round cost per. units to 2 decimal places.)