Cost to own spreadsheet?

[spacemanspif]

Thanks guys, and special thanks to cowmeat for actually making the spreadsheet. I guess I am on the right track with the file I created. Maybe I was trying to make it more complicated for no reason, here is yet another case the most simple answer is the best one. I think more linear, I guess, so mine is just date-miles-cost-notes columns. Not sure how to attach an excel file, otherwise I'd share mine.