(a) Grouper Corp. uses a periodic inventory system and reports the following for the month of June. Date Explanation Units Unit Cost Total Cost June 1 Inventory 122 $4 $488 12 Purchases 488 6 2,928 23 Purchases 305 8 2,440 30 Inventory 285 Compute the cost of the ending inventory and the cost of goods sold under FIFO, LIFO, and average-cost. (For calculation purposes, round average cost to 3 decimal places, e.g. 5.275. Round answers to 0 decimal places, e.g. 125.) The cost of the ending inventory The cost of goods sold $ FIFO GA +A LIFO GA +A $ Average-Cost