Required information [The following information applles 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 selis 15 units for $20 each. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. Note: Round cost per units to 2 decimal ploces