Final answer:
The contribution margin per unit is calculated by subtracting the variable cost per unit ($85) from the sales price per unit ($219), resulting in a contribution margin of $134 per unit.
Step-by-step explanation:
The contribution margin per unit is found by subtracting the variable cost per unit from the sales price per unit. Given that the sales price per unit is $219 and the variable cost per unit for the sensitivity analysis is chosen to be $85, the calculation for the contribution margin per unit is as follows:
Sales price per unit - Variable cost per unit = Contribution margin per unit
$219 - $85 = $134
Therefore, the contribution margin per unit would be $134.