Answer:
30 per hour
Explanation:
The answer it's 30/hour because only the wages are related to the time taken to produce a unit, the others cost are overhead costs, it means that the Payroll cost it's fixed and not dependant of the time tu produce a unit, and the benefits could be a bono at the end of the year that neither varies with the quantities of units.
The only costs associated to production are the wages.