Use the inventory data in the following figure to calculate the cost of goods sold, and ending inventory under the FIFO, LIFO, and weighted average cost methods. And elaborate on the reasons for variations in ending inventory and cost of goods sold under the three inventory valuation methods. Inventory Data January 1 January 7 January 19 Cost of goods available Units sold during January Beginning inventory Purchase Purchase 10 units 7 units 2 units @ $2 per unit = $4 3 units @ $3 per unit - $9 5 units @ $5 per unit = $25 $38