I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets....) U- h ^: u* P5 a4 n" e
' Q! |7 G: L# M- n, j# ~$ T- j) {4 l6 ^For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... 6 k8 c- ]! Q6 b9 i2 p5 c- c5 I' o' Q. S' _: r
I usally charge passager 30 bucks for a trip.