How much is room and board?
Quick search, federal incarceration: $88.52/day or $32,310/yr; 15 bucks a day less if they’re in a halfway house, Federal Register, 2017 figures, $102.60/day or $37,449/yr 2018 figures.
but, in sunny Calif, 2019 numbers were $81K/yr or $221.91/day
The above doesn’t include the average $31K/patient for medical treatment