Pro se means they’re representing themselves. Probably because of no money.

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.