Contribution Margin and Contribution Margin Ratio For a recent year, McDonald's (MCD) company-owned restaurants had the following sales and expenses (in millions): Assume that the variable costs consist of food and packaging, payroll, and 40% of the general, selling, and administrative expenses. 3. What is McDonald's contribution margin? Round to the nearest tenth of a million (one decimal place). mitision b. What is McDonald's contribution margin ratio? Round to one decimal place. % c. How much would operating income increase if sahe-store sales increased by $800 million for the coming year, with no change in the contribut. margin ratio or fixed costs? Round your answer to the nearest tenth of a million (one decimal place) million