Assume Ava Co. has the following purchases of inventory during the first month of operations First Purchase Second Purchase Number of Units 280 221 Cost per unit 3.9 3.5 Assuming Ava Co sells 306 units at $10 each, what is the ending balance in the inventory account if they use LIFO? Assume Hadley Co has the following purchases of inventory during the first month of operations Number of Units Cost per unit First Purchase 300 3.2 Second Purchase 220 4.8 Assuming Hadley sells 320 units at $14 each, what is the cost of goods sold if weighted average is used