I have done parts 1 and 2, but I need part 3. See attachment.

1 2 1 2 3 Part 3 Chevron Annual Report - https://www.chevron.com/-/media/chevron/annualreport/2015/2015-Annual-Report.pdf What method of inventory costing does Chevron use? Assuming that the "excess of replacement cost over the carrying value of inventories" is the LIFO reserve, had Chevron used the replacement cost to value the inventory, what would be the inventory balance on the balance sheet? be the cost of purchased crude oil and products? be the net income of Chevron, assuming a statutory tax rate of 35%. Compute the ROA and ROE of Chevron using the LIFO reported inventory numbers and the replacement cost numbers. What impact did using LIFO have on the ROA and ROE