Answer:
The contribution per machine hour for wales = $17 per hour
Step-by-step explanation:
contribution per machine hour is the contribution margin divided by the number of machine hours used for the equivalent production.
Contribution margin on the other hand, is the aggregate amount available on the sale of a product, after all the associated variable costs have been deducted.
The contribution per machine hour = contribution margin ÷ machine hour
Contribution margin = selling price - variable costs
For wales; selling price = $32; variable costs = $15; machine hour = 1 hour
∴ contribution margin per machine hour = (32- 15) ÷ 1
= 17 ÷ 1 = $17 per hour.