I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets...., F) \( _1 t! t' G. 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.....4 B/ W* z3 a+ Y( w: A
7 F8 b/ R8 X6 k6 c h W& CI usally charge passager 30 bucks for a trip.