LMAO! That was a great question! I spend around $300 a month, so for a day I guess around $10. It's just me and my son, but my other kids and grand kids eat when they come over to.
Now, I spent about $300 per month of food... so per day, that's like $10... standard UK food bill for one person...
I live in the UK, food is very expensive here at the moment, I would say 10-12 dollars equivalent per person
It is depend if you eat out then it will cost you more and if you cook at home then it will cost you less. Again it depends which part of the world you are ? UK suppose to be more expensive then compare to any city in Asian countries. People in India prefer to cook at home so mostly they bring raw food that is less expensive then ready and packed food. But I have no idea how much I spend in food, because my wife take care of it