Contribution margin

Sally Company sells $29,000$ units at $$27$ per unit. Variable costs are $$17\mathrm{.}55$ per unit, and fixed costs are $$87,700.$

Determine $($a$)$ the contribution margin ratio, $($b$)$ the unit contribution margin, and $($c$)$ operating income.

a$.$ Contribution margin ratio $($Enter as a whole number.$)$

b$.$ Unit contribution margin $($Round to the nearest cent.$)$

$\%$

c$.$ Operating income