Answer:
397 hours
Explanation:
The computation of demand of labor is given below:-
The full form of MPL is Marginal revenue product of labor which equals to
= Marginal revenue × Marginal product labor
Given that
MPN = A × (400 - N)
So,
Marginal product labor = 3×A×(400-N)
Marginal product labor = $18
So,
3×A×(400-N) = $18
3×2×(400-L) = $18
N = 400-3
= 397 hours
So, the number of labor will be demanded 397 hours