please solve finding the

a) LIFO

b) Average Cost (or weighted average)

3. Staffy Company made purchases of a particular product in 2022 as follows: Staffy Company made sales on the following dates at a selling price of $15/ unit: The business uses a perpetual inventory system. Determine the cost of goods sold ending inventory valuation using the following methods: b. LIFO c. Average Cost (or weighted average)