Compute inventory and cost of goods sold wsing periodic FIFO, LIFO, and average-cost. B6.8 ( 1020 . , AP Jeters Company uses a periodic inventory system and reports the following for the month of June. Instractlons a. Compute the cost of the ending inventory and the cost of goods sold under (1) FIFO, (2) LIFO, and (3) average-cost. (Round average unit cost to three decimal places.) b. Which costing method gives the Mighest ending inventory? The highest cost of goods sold? Why? c. How do the average-cost values for ending inventory and cost of goods sold relate to ending inventory and cost of goods sold for FIFO and LIFO? d. Bxplain why the sverage cost is not 56