As per the title. something like profit / (1+concentration cost)

In order to avoid every marginally beneficial craft requiring no concentration to get on top, maybe either

1.) Only list craft requiring concentration
2. ) Use some coefficient like profit / (1+(concentration/50))

this is already implemented as "concentration value"
u can see it when scanning with concentration and u can sort by it in the sort mode option

I thought that was sorting by concentration used value only.
Didn't even try it actually, indeed thanks, closing then.