Talk:RR3 Wiki:Upgrades Strategy For 100% Completion/@comment-4628028-20160527081457/@comment-25956839-20160527084235

See the key at the top of the page:
 * Minus Signs (-)	Refers to upgrades not to acquire from Fully-Upgraded
 * Plus Signs (+)	Refers to upgrades to acquire from Fully-Upgraded with R$

A car with 7 engine upgrades, with the first two are R$, the third is, a +1 would be 3/7, a -1 would be 6/7.

The - upgrades are easy to check, the + upgrades needs to be referred to the car page and check your actual upgrades vs the car page w/R$ and upgrades.