4* covers, roster and sell Iso gain question

I know it’s been talked about, but I can’t find the math anywhere. I have some covers that are going to die on the vine and a Luke Cage 4* that I’d really like to champ, just need a teeny bit more ISO in time (14 hours left). I also have 3 C4rol covers on the vine (she’s at 5/5/1…ugh). What’s the math to roster a 4*, level it to a certain point, and then sell it for a net ISO gain? Thanks!

You need to have two covers of the same color, roster it, and level it to 83 I Believe. That nets you a few thousand ISO in profit.

Yep, my 3 C4rol covers are (were) all yellow. Did what you suggested and netted an additional gain of 1,077 Iso. Not much, but it all helps. Thanks Quebbster!