For a recent year, Wicker Company, a business consisting of company-owned restaurants, had the following sales and expenses (in millions):

Sales	$17,200
Food and packaging	$5,880
Payroll	4,300
Occupancy (rent, depreciation, etc.)	4,000
General, selling, and administrative expenses	2,500
	$16,680
Income from operations	$520

Assume that the variable costs consist of food and packaging, payroll, and 40% of the general, selling, and administrative expenses.

a. What is Wicker Company's contribution margin? $ million

b. What is Wicker Company's contribution margin ratio? %

c. How much would income from operations increase if same-store sales increased by $1,000 million for the coming year, with no change in the contribution margin ratio or fixed costs? $ million