How much do you spend on groceries a month?

I live in NYC and am currently taking care of myself.I am in my early 20s I truly believe i can survive off $50-$60 on groceries each month. Do you guys think this is doable?
Update: I plan on buying bulk foods. That can last a while. Plus, i do plan on occasionally having lunch outside home, because i doubt i would have time and resources to be making myself lunch for work.So basically my groceries are for dinner and breakfast.
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