I am very confused at the calculations...mostly because I bought my TDI 1015 Beetle coup, no nav or sunroof, 8 days before the scandal broke. So I see the buyback is 28136, I have 13k miles on the car, it looks to me like I get a credit of 510 for mileage....and the modification number is 7178 + 85 for mileage.....so…