tried doing tutorial but keep getting confused help pls

Contribution margin and contribution margin ratio For a recent year, McDonald's (MCD) company-gwned restaurants had the following sales and expenses (in millions): Assume that the variable costs consist of food and paper, payrol, 25% of occupancy and other expenses, and 40% of the general, seling, and administrative expenses. a. What is MeDonald's contribution margin? milion b. What is McDonald's contribution margin rabo? Reund to one decimal place. x c. How much would operating income increase if same-store sales increased by $1,000 millon for the coming year, with no change in the contribution margin ratio or fixed costs? Round your answer to the nearest tenth of a million (one decimal place). million