With the following infromation:

1. Compute the contribution margin.

Contribution Margin = Selling price per unit - Variable Cost

Variable Cost = $1,500+$30,000+$3,000+$6,000 = $40,500

Contribution Margin =(12000*18) - 40,500= 175,500

2. Compute the contribution margin ratio.

Contributuion Margin Ratio= (Contribution Margin/Sales price per unit)*100

Contributuion Margin Ratio = (175,000 /216,000)*100 = 81.25%

, please help me to compute the break-even in sales units, the break-even in sales dollars and the margin of safety in units.