Answer and Explanation:
The computation is shown below:
a. Total sales is
= 550 clients × $150
= $82,500
Variable costs is
= 60% of sales
= 60% × $82,500
= $49,500
Now
Contribution margin is
= total sales - variable costs
= $82,500 - $49,500
= $33,000
and, Contribution margin per unit is
= contribution margin ÷ total units
= $33,000 ÷ 550
= $60
And,
Contribution margin ratio is
= contribution margin ÷ total sales
= $33,000 ÷ $82,500
= 40%