Don't trucks have to refuel all around the country in order to deliver all around the country? Besides, I don't think they're running their own fleet.
Yes, but I'm looking at it from a delivery starting point. They'll always have to refill from another area of the country on the way back. The starting point from their warehouses in PA and CA will have higher prices in fuel compared to a starting point in Kansas City.
I doubt they have their own fleet either, but they are probably going to have to cover that fleet's fuel costs in some way.