In the "add a note" section, it would be nice to have an optional field for a dollar amount spent. Then on the home screen for a vehicle, this amount could be used to compute the cost per mile. For instance, if you add "Oil change & filter", and a dollar amount of say $25, that $25 would be added to the total cost per mile of operating the car. Mabye there could be 2 cost per mile amounts, one for fuel only, and one including everything.
fugalaya 
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