Klumb Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 74 units were sold.

Date	Explanation	Units	Unit Cost	Total Cost
May-01	Inventory	30	$9	$270
15	Purchase	25	10	250
24	Purchase	38	11	418
Total	93	$938

Instructions

Calculate the ending inventory at May 31 using the (a) FIFO, (b) average-cost, and (c) LIFO methods. (For average-cost, round the average unit cost to three decimal places.) Prove the amount allocated to cost of goods sold under each method.