For a recent year, mcdugal's company-owned restaurants had the following sales and expenses (in millions): sales $34,300 food and packaging $14,545 payroll 9,100 occupancy (rent, depreciation, etc.) 5,455 general, selling, and admin. expenses 5,200 other expense 690 total expenses (34,990) operating income (loss) $(690) 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? enter your answer in million, rounded to one decimal place. $ 8,575 million b. what is mcdonald's contribution margin ratio? round your percentage answer to one decimal place. 25 % c. how much would operating income increase if same-store sales increased by $2,100 million for the coming year, with no change in the contribution margin ratio or fixed costs? $ 180 million d. what would have been the operating income or loss for the recent year if sales had been $2,100 million more? $ -510 million