auto sales hw part way done

I worked through setting up my Car and UsedCar class pretty easily. (Usedcar still needs some work - trying to figure out where to put constant mileage depreciation).

I ran into trouble when I had to include my new classes inside of each other (ex: damages in UsedCar and Car in CarLot). Once I figure that out I think I will be able to finish up the homework pretty quickly.