please help with a b and c

Coetribution 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 varioble costs consist of food and paper, payroll, 25% of occupancy and other expenses, and 40% of the general, seling, and administrative expenses. a. What is McDonald's contribution margin? x million b. What is McDonalers contribution margin ratio? Round to one decimal place. c. How moch whuld operating income increase if same-store sales increased by 3900 miltion for the coming year, with no chang in the contribution margin ratio or fixed . coats itsund vour answer to the nearest tenth of a million (one decimal place)