Contribution margin

Willie Company sells $39,000$ units at $$47$ per unit. Variable costs are $$34\mathrm{.}31$ per unit, and fixed costs are $$282,100.$

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.$)$ $ $$ per unit

c$.$ Operating income $$