Board Thread:Game Discussion/@comment-27798333-20161109015316/@comment-26329136-20161109075430

If you won the car in the limited-time series and want to 100% complete Road Masters, then it would cost:

191 for the limited-time series and a further ~72  to upgrade. Reward of 70 for completing the limited-time series. A total cost of around 193.

If you didn't win the car in the limited-time series, then it would cost:

~120 to upgrade. It was possible to get 20 reward during the limited-time series for 50% completion. A total cost of around ~100 to ~120.

If you didn't win the car during the limited-time series, you will spend 73 to 93  less upgrading this car than if you won it.