I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... 6 Z6 \3 T8 B5 n. Y . `$ ^( T! ^% L/ f! l4 F4 H! PFor me, I think car-pool is just to share part of gas "cost" and have some fun on road..... " N7 L& p3 F9 X4 `1 y) f / s# B/ x$ ^6 L r! GI usally charge passager 30 bucks for a trip.