Talk:RR3 Wiki:Upgrades Strategy For 100% Completion/@comment-61.245.163.91-20161221163021/@comment-27945602-20161221164159

You already spent 86 gold on Supercar so you only need 10 gold on C.F.S. If you are to calculate overall cost on C.F.S again, then you double-calculate your gold. As you don't trial on the same charge (Double Jeopardy), you should not calculate the 86 gold because you already spend it on the Supercar.

Likewise you already fully upgraded your FXX K on Italian Prime, you don't need any cost to participate in FXX K Exclusive Series. So any gains from the series is gain, not loss. You already wasted your gold on fully upgrading the FXX K.