I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... 4 f+ A" Y4 i: H, i" _: ~' W4 s9 c4 l& @; H: I! ]0 \2 V: b
For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... 0 x [# d! f' P+ s+ S. b M& A6 t6 v9 O X
I usally charge passager 30 bucks for a trip.