Required 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 15 units for \$50 each. Vetermine the costs assigned to ending inventory when costs are assigned based on the welghted average method. lote: Round cost per units to 2 decimal places