i need help. ive seen people usually 450 and mulitplying it to 20 and ive seen people multiple 760 by 20 whats the right way for lifo?

The Wine Guy of Napa Valley inventory records show the following data for the month of March for a private reserve Coppola Merlot Wine: Inventory, March 1 Purchases: March 12 March 23 Units 760 120 290 Unit Cost $20.00 21.00 22.00 A physical inventory on March 31st shows 450 units on hand. Calculate the value of ending inventory and cost of goods sold if the company uses LIFO inventory system