15. Use the following information to calculate ending inventory and cost of goods sold for April under each of three methods: (a) FIFO, (b) LIFO, and (c) weighted average cost. Assume the periodic inventory system is used. (Show your work.)

Apr. 1 Beginning inventory 90 units @ $40

8 Sales 70 units

17 Purchases 150 units @ $42

24 Sales 110 units

30 Purchases 60 units @ $44