Answer:
$59.54 per unit.
Step-by-step explanation:
We will need to first compute the contribution margin per unit for each drive.
Contribution margin per unit = Selling price per unit - Variable expenses per unit .
Therefore for Q-drive,
= $125.53 - $83.31
= $42.22
For Q-drive plus
= $231.43 - $160.34
= $71.09
Weighted average unit contribution margin ratio
= Weighted sales mix × Contribution margin + Weighted sales mix × Contribution margin
= 40% × $42.22 + 60% × $71.09
= $16.888 + $42.654
= $59.54 per unit