Contribution margin and contribution margin ratio For a recent year, Mcdonald's (MCD) company-owned restaurants had the following sales and expenses (in millions): Sales $22,000 Food and paper $ (2,800) Payroll and employee benefits (2,100) Occupancy and other expenses (4,400) General, selling, and administrative expenses (3,700) $(13,000) Operating income $9,000 Assume that the variable costs consist of food and paper, payroll, 25% of occupancy and other expenses, and 40% of the general, selling, and administrative expenses. a. What is Mcdonald's contribution margin? $ million 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 million 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