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Contribution margin and contribution margin ratio For a recent year, MeDonald's (MCD) company-owned restaurants had the following sales and expenses (in millions): Assume that the variable conts consist of food and paper, payroll, 25% of occupancy and other expenses, and 40% of the general, seling, and administrative expenses. a. What is Mcbonald's contribution margin? Round to the nearest tenth of a miation (one decimal place) mision b. What is McDonald's contribution margin ratio? Round to one decimal place. c. How much would operating income increase if same-store sales increased by $800 milion for the coming year, with no change in the contribution margin ratio or fixed costs? Hound your answer to the nearest tenth of a miaton (one decimal place). mition