can you break down the math

Question 1 INVENTORY METHODS: Co. F has the following units of beginning inventory and purchases for the year: beginning inventory 100 units at $40 each, a 2/28 Purchase 200 units at $50 each and a 6/15 purchase of 200 units at $60 each and a 12/15 purchase of 100 units at $70 each. Using the FIFO method, if the ending inventory is 300 units, what is the cost of the ending inventory? A. 25000 B. 22,667 C. 19,000 D. 14,000 E. None of the above