I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets....; R0 `% z5 {+ Z, ?; @/ R1 Z
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For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... / s5 ?! _' N! N, T% a 0 H [1 d- l4 `$ v5 [" GI usally charge passager 30 bucks for a trip.