I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... % P! j0 z2 y( p' S3 z( ~6 {6 k2 y: F# j4 d# X0 Y4 {
For me, I think car-pool is just to share part of gas "cost" and have some fun on road.....) g/ X4 s3 t T; x' x# b# [2 V
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I usally charge passager 30 bucks for a trip.