Use the following inventory related information for Questions 15-17.

April 1	Beginning Inventory	100 units @ $4
April 2	Sales	50 units
April 3	Purchases	300 units @ $6
April 10	Sales	250 units
April 21	Purchases	400 units @ $8
April 28	Sales	200 units

15. Assuming a periodic inventory system is used, what is ending inventory under LIFO?

16. Assuming a periodic inventory system is used, what is cost of goods sold under FIFO?

17. Assuming a periodic inventory system is used, what is ending inventory under the Weighted-Average Cost method?