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

Sales $$36,700$

Food and packaging $$13,903$

Payroll $9,300$

Occupancy $($rent$,$ depreciation, etc.$)7,097$

General, selling, and administrative expenses $5,300$

$$35,600$

Income from operations $$1,100$

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.$)$

$fill in the blank $1$

million

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

fill in the blank $2$

$\%$

c$.$ How much would income from operations increase if same$-$store sales increased by $$2,200$ million for the coming year, with no change in the contribution margin ratio or fixed costs? Round your answer to the closest million.

$fill in the blank $3$

million