*fit the bill - https://dictionary.cambridge.org/us/dictionary/english/fit-t...

No. Foot is right, meaning "pay". "Fit the bill" is also used, but not in this context.

Yes. _Fit_ is right, specifically in this context. Re-read the comment you're talking about. In fact, either work fine. I'm taking issue with the pedantry we're engaging in here (while admittedly adding to it).

The context was clearly about payments. So it's foot. It's not particularly ambiguous even.

I don't correct people to be pedantic or argumentative. I love being corrected and learning from others, but I suppose not everyone does.

Yes, it is "foot the bill" in regards to paying for it. My mistake but I am glad everyone had some fun learning!