Contribution Margin and Contribution Margin Ratio

For a recent year, McDonald's company-owned restaurants had the following sales and expenses (in millions):

Sales	$18,169.3
Food and packaging	$ 6,129.7
Payroll	4,756.0
Occupancy (rent, depreciation, etc.)	4,402.6
General, selling, and administrative expenses	2,487.9
	17,776.2
Income from operations	$ 393.1

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