The linked page uses the Mifflin-St Jeor Formula which appears to have been published in 1990. As someone acquainted with eugenics but not how BMR calculations play a role, could you share some I formation on how the two are related?

Everywhere I’ve lived, most groceries aren’t taxed, so what’s showing would be the final price.

Things that might be taxed are things like pre-prepared food or soda.

It’s rampant click bait. I try not to reward the behavior with clicks, but sometimes I’m genuinely interested in the topic. This is not one of those times.