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. a. What is McDonald's contribution margin? Round to the nearest million. (Give answer in millions of dollars.) 1 x million b. What is McDonald's contribution margin fatio? 4. c. How much would operating income increase if same-store sales increased by $2,300 milfion for the coming yeac, with no chang in the contribution margin ratio or fored costs? Round your answer to the closest million. 4 million