Suppose your company runs the shuttle business for a hotel

Question

Suppose your company runs the shuttle business for a hotel to and from the local airport.  The costs for different customer load are:

1 customer: $30

2 customer: $32

3 customer: $35

4 customer: $38

5 customer: $42

6 customer: $48

7 customer: $57

8 customer $68

1. What are your marginal costs for each customer load level?
2. If you are compensated $10 per ride, what customer load would you choose?