Doing the Math - Week Eleven

A green engine with five connected train cars leaves the station from the Midwest headed for Florida. Days later, a yellow engine with three connected train cars leaves the same station headed for California. If the Florida bound train travels 1330 miles at an average speed of 55 mph, while the California bound train travels 1720 miles at an average speed of 70 mph, how much does it cost for them to return to the Midwest?

$80.

Told you the project was about the process, not the profit.