Answer: You should carry 6 customers per load!
Step-by-step explanation:
In order to maximize profits, you should carry 6 customers per load. This is because the marginal cost for a load of 6 customers is $90, which is the lowest marginal cost of any load size. The average cost per customer for a load of 6 customers is $15, which is lower than the average cost for any other load size. Therefore, carrying 6 customers per load will allow you to make the most profit since the average cost is lower than the marginal revenue of $16.