I need to know A, B, & C......

Contribution Margin and Contribution Margin Ratio For a recent year, McDonald's company-owned restaurants had the following sales and expenses (in millions) Sales Food and packaging Payroll Occupancy (rent, depreciation, etc.) General, selling, and administrative expenses $18,169.3 $6,129.7 4,756.0 4,402.6 2,487.9 17,776.2 $ 393.1 Income from operations 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 tenth of a million (one decimal place) million b. What is McDonald's contribution margin ratio? Round to one decimal place c. How much would income from operations increase if same-store sales increased by $500 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