Date Explanation Units Unit cost Total cost June 1 Inventory 220 $11 $2,420 12 Purchases 330 13 4,290 23 Purchases 490 14 6,860 30 Inventory 210 Required Calculate cost of the ending inventory and the cost of sales under FIFO, LIFO and average cost. (Round average cost per unit calculations to 2 decimal places, e.g. 12.36 and final answers to O decimal places, e.g. 2,347.) (a) FIFO $ (b) LIFO Ending inventory $ $ $ (c) Average cost Cost of sales