Found the foundation calculator which went missing
I'm guessing the creator didn't got much views so it didn't went into notice. Here's the link for video: https://youtu.be/Lzuj1kJ4IHQ
And sheet link: https://docs.google.com/spreadsheets/d/1PajLUmUmb285GetFr7OCPqV2wvXIGU0t/edit?usp=sharing&ouid=112613629594261556953&rtpof=true&sd=true
It works for my requirements, so my appreciation to the creator..