Answer and Explanation:
The computation is shown below
a.
For Contribution Margin ratio
We know that
Contribution margin per unit = Sale price per unit - Variable cost per unit
= $45 - $27
= $18
Now
Contribution margin ratio = Contibution Margin per unit ÷ Sale price per unit
= $18 ÷ $45
= 0.4
Now
Break even sales dollar
Break even sales = Fixed Cost ÷ Contribution margin ratio
= $247,000 ÷ 0.4
= $617,500
b.
For Margin of Safety
The Margin of safety = Actual sales - Break Even Sales
where,
Actual sales(in $) = 20000 × 45
= $900,000
So, Margin of safety is
= $900,000 - $617,500
= $282,500