The BLS reports an annual expenditure of $7,729/year per "consumer unit", and an average of 2.5 persons per consumer unit, so about $3,100/person/year in 2017.

The BLS reports an annual expenditure of $7,729/year per "consumer unit", and an average of 2.5 persons per consumer unit, so about $3,100/person/year in 2017. That number is probably a few years old. I do wonder if this accounts for SNAP and other food expenses not directly paid with cash income. https://www.bls.gov/opub/reports/consumer-expenditures/2017/home.htm#table1 https://www.bls.gov/opub/reports/consumer-expenditures/2017/...