I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... ; p' b0 X. k4 V3 t1 ^ 4 Q5 g3 U, F, n! u* n1 eFor me, I think car-pool is just to share part of gas "cost" and have some fun on road..... $ k$ j9 n0 U. z# U! f7 ]' Z2 t: i5 N j* G
I usally charge passager 30 bucks for a trip.