Sunn Company manufactures a single product that sells for $$180$ per unit and whose variable costs are $$135$ per unit. The company's annual fixed costs are $$562,500.$

$($a$)$ Compute the company's contribution margin per unit.

$($c$)$ Compute the company's break$-$even point in units.

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$($d$)$ Compute the company's break$-$even point in dollars of sales.

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