Contribution Margin and Contribution Margin Ratio

For a recent year, McDooley's, a family$-$owned group of restaurants, had the following sales and expenses:

Sales for all restaurants

$$325,000$

Food and paper

Payroll and employee benefits

Occupancy and other expenses

Selling, general, and administrative expenses

Other operating expenses

Net operating expenses

Operating income $($loss$)$

Assume that the variable costs consist of food and paper, payroll and employee benefits, and $40\%$ of the selling, general, and administrative expenses.

a$.$ What is McDooley's contribution margin?

$

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

$\%$

$

d$.$ What would have been the operating income or loss for the recent year if sales had been $$6,500$ more?

$