https://i.imgur.com/R1yqYyk.png here is my question

Problem 6-06A a1-a2 (Part Level Submission)

You are provided with the following information for Vaughn Inc. Vaughn Inc. uses the periodic method of accounting for its inventory transactions.

March1Beginning inventory 2,100 liters at a cost of 60 per liter.March3Purchased 2,500 liters at a cost of 62 per liter.March5Sold 2,300 liters for $1.05 per liter.March10Purchased 4,000 liters at a cost of 69 per liter.March20Purchased 2,400 liters at a cost of 77 per liter.March30Sold 5,100 liters for $1.25 per liter.