Swifty Corporation uses a periodic inventory system and reports the following for the month of June. Compute the cost of the ending irventory and the cost of goods sold under FIFO, LIFO, and average-cost. (Round per unit cost to 3 decimal places, es. 15.647 and final answers to 0 decimal places, es. 5.125.) Which costing method gives the highest ending inventory? The highest cost of goods sold? Highest ending inventory Highest cost of goods sold