I started this question taking the number and dividing by net income. I am supposed to be using vertical (common-size) computations but I am unsure of which numbers I am to divide by.

Assume the average price of a litre of gas in 2017 jumped $0.17 (16 percent) from $1.04 in 2016 to $1.21 in 2017. Let's see whether this change is reflected in the income statement of Suncor Energy Inc. for the year ended December 31, 2017 (amounts in billions). Total Revenues Costs of Crude Oil and Products Other Operating costs 2017 2016 $ 273 $ 221 171 133 5956 Income Before Income Tax Expense Income Tax Expense 43 19 32 13 Net Income $ 24 $ 19 2-a. Conduct a vertical analysis by expressing each line as a percentage of total revenues. (Round your answers to 1 decimal places.) SUNCOR ENERGY INC. Income Statements Change in 2017 1,137.5 % 712.5 % 245.8% 2016 1,163.2 % 594.7% 294.7% 50% Total revenues Costs of crude oil and products Other operating costs Income before income tax Income tax expense Net income 2-b. Excluding income tax and other operating costs, did Suncor earn more profit per dollar of revenue in 2017 compared to 2016? Yes O No