Need help calculating the LIFO for the given info in the first photo

Project Facts Walmart, a large merchandising company, presents the following information on their bulk purchasing of Slate PCs for the and their subsequent sales to store customers for the calendar year 2019. Slate PC Bulk Purchases and Sales for the period January 1, 2019 - December 31, 2019 (1) Date (2) Transactions (3) Units (5) Total Cost (3) Unit Cost $540 January 1, 2019 150 $81,000 March 8, 2019 August 22, 2019 October 29, 2019 Totals Beginning Inventory Units Purchased Units Purchased Units Purchased 120 100 80 450 Units S570 S600 $640 $68,400 $60,000 S51.200 $260.600 400 Units Jan 1 through Dec.31 2019 Units Sold to Customers Sales Price per unit $700 per Unit LIFO Inventory Production Costing Method and Customer Sales Journal Entries A. Prepare an Inventory T-Account for Costs (column (4)). Post the beginning balance on Jan 1, 2019 and the purchases made in 2019 B. Calculate the COGS for the 400 Units sold in 2019 using the FIFO Inventory Costing Method C. Prepare all the necessary journal entries to record the 2019 sales, assuming all sales were on account Date Account Debit Credit D. What was the Gross Profit in dollars on this sale? E. What was the Gross Profit Ratio on this sale? F. Update the Inventory T-Account for the sales