For a recent year, McDonald's Company-owned restaurants had the following sales and expenses (in milions): Assume that the yariable costs consist of food and packaging, payroll, and 40% of the general, selling, and adminitrative expenses. a. What is MeDenald's contribution margin? Round to the nearest malion. (Give answer in millions of dollars.) million b. What is MCDonald's contribution margin ratio? % c. How much would income from operations increase if same-store sales increased by $2,200 mililon for the coming year, with no change in the contribution margin ratid or fixed costs? Round your answer to the closest million. 4 miltion