I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... : S& G# m- b7 r; F* N 2 k5 k2 M( g. W& L( XFor me, I think car-pool is just to share part of gas "cost" and have some fun on road...../ U9 Z/ }: [/ B, N E. j4 w! m" A
- z5 Y$ {1 J7 s) C, J
I usally charge passager 30 bucks for a trip.