Intermodal Billing

How does the billing work for containers on well cars? If I have a CSX container on a BNSF well car how does the billing work?
Or mixed containers on well cars like CSX and JB Hunt on one car wich is bnsf or a TTX car?

Unless things have changed, a steamship line (on international traffic) or a JB Hunt or other such operator has a contract with the railroad for (usually) an annual or multi-year volume of containers to move on double-stack cars. The individual shipper receives a bill from the steamship line, or Hunt or whoever, for the entire transportation distance including any highway movement and is not involved in deciding how the container is routed. In the example cited, the CSX container may not even have been loaded at a CSX origin; in the case of an individual shipment the shipper would be billed by the origin railroad, which would then settle with any connecting road--something which happens more rarely nowadays since so many movements are now local to one railroad. If the shipment is sent collect, the destination railroad renders the bill and settles with the other railroads if such are involved.

Everything is now done online billing wise,depending on who's paying the freight bill(Shipper,Receiver,Trucking Co,etc...)
All the space avaible on an intermodal train is filled on a 1st come.1st served basis,sometimes there're reserved
spaces paid for in advance.
Everybody involved with the move will get a cut,including any Drayage move in Chicago from 1RR's ramp to the Connecting RR's ramp...
The only Hangup is when the Trailer/Container shows up at the ingate before the "electronic data interchange" work
is done.