On average for calendar year 2024, it was $35 a day, living in Cluj-Napoca, Romania. For two people. My guess would be this is on the higher end of things, but I'm curious about others. Another factor is I am 95kg, 15% bf and do resistance training 6 times a week, so I eat a lot.
(I beancount[1] my finances.)
[1]: https://beancount.github.io/