I leave here a test for a STL business:

https://docs.google.com/spreadsheets/d/1iAbTjIra72mzLASgSjmBN0WRIsPKCdHC/edit?usp=sharing&ouid=110863539841213082707&rtpof=true&sd=true


I leave some calculations of fees and sales for a STL Business in different plaftorms.