Answer:
The marginal benefit of working each hour of overtime is $18.
Step-by-step explanation:
Marginal Benefit refers to the maximum price I would pay for a second (or more) product or service.
In this case, the employer is willing to pay for each extra hour the amount of $18, which means that the Marginal Benefit increases.
It is considered, that the perceived value by the employer for each extra hour is $18.