Answer:
a. 17.5
b. 12
Explanation:
Given that
Marginal cost = $100
The computation of optimal contract length is given below :-
Marginal benefit = Marginal cost (length )
a. $100 = 30 + 4L
L = 70 ÷ 4
= 17.5
b) 100 = 40 + 5L
L = 60 ÷ 5
= 12
Therefore, for calculating the optimal contract length simply we calculate both the equations equals with marginal benefit to the marginal cost (length)