Production requires one plane. The amount you pay each period to rent the plane depends on the number of flights per period. The table shows the total amount you pay per period to rent the plane as a function of the number of flights per period.

You have scheduled 6 per period. If the amount you pay to rent the plane represents all of your costs, what are your per-period average total costs?

Flights	0	1	2	3	4	5	6
Rental Price	400	429	450	468	479	488	489