I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets....( \) P0 N4 ]' h
) r' I; u; m4 `For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... " F9 o/ A$ M! ^: I4 @' s3 p- t; c5 g % y6 ~8 U' D2 M0 m% g% G1 nI usally charge passager 30 bucks for a trip.