Answer:
$300
Step-by-step explanation:
Data provided as per the question
Increase in volume = $400
Wage rate = $100
The computation of marginal revenue is shown below:-
Marginal revenue = Increase in volume - Wage rate
= $400 - $100
= $300
Therefore for computing the marginal revenue we simply deduct wage rate from increase in volume. So, the marginal revenue is $300.