Contribution Margin and Contribution Margin Ratio

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

Sales	$21,500
Food and packaging	$8,410
Payroll	5,400
Occupancy (rent, depreciation, etc.)	3,950
General, selling, and administrative expenses	3,100
	$20,860
Income from operations	$640

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? Round to the nearest million. (Give answer in millions of dollars.) $ million

b. What is Wicker Company's contribution margin ratio? Round to one decimal place. %

c. How much would income from operations increase if same-store sales increased by $1,300 million for the coming year, with no change in the contribution margin ratio or fixed costs? Round your answer to the closest million. $ million