i am making an excel chart to track efficiency costs for a silly idle clicker game i play and need some help creating an formula to evaluate production efficiency so i know what upgrades to get when
example: getting this certain planet upgrade means i will make an additional 232.42 M stardust but the upgrade costs 1.38 B and the planet cycles every 6 seconds
it's been a hard last several weeks and i'm low on mental energy and can't figure this out.





