I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets....- M& ]2 g5 H( x1 E, \# T: p
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For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... . A$ l4 p$ W: o3 G& t( o3 ]4 q x2 v: X2 s
I usally charge passager 30 bucks for a trip.