I am trying to set up a carpool with a fellow student. Since my family is down to one vehicle, I would like to ride all the time. What would be a proper amount to offer the person driving based on miles per gallon, cost of gas, etc? Is there a formula for this, or would a flat rate per mile be more appropriate?
It currently costs me about $7.50 in gas every time I make the trip, but I don't know how to factor in other costs.
Thanks!
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