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

1 customer:$30

2 customers: $32

3 customers: $35

4 customers: $38

5 customers: $42

6 customers: $48

7 customers: $57

8 customers: $68.

If you are compensated $10 per ride, what customer load would you choose?