Chilton, Incorporated, sold $12,800$ units last year for $$20$ each. Variable costs per unit were $$2\mathrm{.}00$ for direct materials, $$3\mathrm{.}10$ for direct labor, and $$3\mathrm{.}10$ for variable overhead. Fixed costs were $$61,200$ in manufacturing overhead and $$41,800$ in nonmanufacturing costs.

Required:

a$.$ What is the total contribution margin?

Note: Round your intermediate calculations to $2$ decimal places.

b$.$ What is the unit contribution margin?

Note: Round your answer to $2$ decimal places.

c$.$ What is the contribution margin ratio?

Note: Round your intermediate calculations and final answer to $2$ decimal places.

d$.$ If sales increase by $2,150$ units, by how much will profits increase?

Note: Round your intermediate calculation to $2$ decimal places and final answer to the nearest dollar amount.

$\backslash$table$[[$a$.$ Total Contribution Margin,,$],[$b$.$ Unit Contribution Margin,,$],[$c$.$ Contribution Margin Ratio,,$\%$