can u show a step by step with numbers?

show work?

method cogs. end inv

fifo

lifo

average cost

1. The units of Product AOK available for sale during the year were as follows: Apr1Apr16Apr20Apr22Apr30InventoryPurchasePurchasePurchase1Sunit20units30units50units40units@@@@$16=320$18=540$22=1100$21= Assume that all sales were after April 22nd. Determine the cost of goods sold and the ending inventory valuation by (a) fifo, (b) lifo, and (c) average cost methods