There sure are a lot of ratios, lol. Mark Meldrum said not to try and memorize all of them because there are far too many across the CBOK for lvl 1 and I believe him. That said, which ones do I pick and choose? How do I get through reading 26 and what should I get out of it?
I paid for the Wiley formula list and ticked the ones coming up in questions, mocks and highlighted by the Kaplan tutors. Could have made my own list but not a great use of time in my view.
You end up with a pretty strong primary list to focus on and a secondary list to learn if you have time.