IIRC, the book value was 50,000 C-Bills per Dropship Collar per jump. So if you only need 1 collar to travel 3 jumps, you will pay a total of 150,000 C-Bills.
If you are transporting your company by using 3 Leopards, each with a Lance of Mechs, and a refitted Union that has been redone to be a cargo hauler, that is a total of 4 Dropship Collars needed, and if you have to travel 3 jumps, that is 600,000 C-Bills needed.
Now one person did some accounting to get other numbers here:
http://www.heavymetalpro.com/forums/viewtopic.php?f=1&t=4122Short version, here are the costs per collar for various Jumpships if you had to pay them off:
Scout: $529,500 c-bills
Merchant: $391,500 c-bills
Invader: $293,500 c-bills
Magellan: $728,500 c-bills
Chimeisho: $338,000 c-bills
Tramp: $449,500 c-bills
Star Lord: $219,500 c-bills
Monolith: $195,000 c-bills