Contribution margin

Sally Company sells $38,000$ units at $$18$ per unit. Variable costs are $$15\mathrm{.}12$ per unit, and fixed costs are $$63,500.$

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

$\%$

$$ per unit

$