What is the cost of goods available for sale for May? What is the ending inventory valuation at May 31 using the FIFO method? average cost method? LIFO method? What is the cost of goods sold during May under the FIFO method? average cost method? LIFO method? PLEASE answer all parts!

West Company uses a periodic inventory system. The following information applies to May. May 1 Inventory 30 May 15 Purchase May 24 Purchase Date Explanation Units Unit Cost Total Cost $9 270 250 540 $1.060 25 45 100 10 12 Total Weat sold 80 units in May