determine the costs assigned to ending inventory when costs are assigned based on the FIFO method

[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 25 units for $45 each. Determine the costs assigned to ending inventory when costs are assigned based on the FIFO method