User blog comment:Sirebel/Mathematician Required - Apply Within/@comment-30967537-20170430023559

Have you made any progress on this? Short of testing LOTS of different upgrade options (some cars have a staggering number of options, in excess of 200,000!) OR delving into the files to find the data, I don't think it's possible with any real accuracy. I built a Power Query script (using the current one-decimal-place information we have) to calculate the minimum cost (Gold and R$) upgrade option for all cars-series combinations.