A Reddit screenshot: This sounds like a job for a fermi approximation. I buy a week's food for 2 people when I shop. I think I visit less than 1 in 1000 items. In that for every 1000 distinct products they sell, I think I have 1 of them. I think whenever I buy an item there are about 10 on the shelf, and probably another 10 behind the scenes. So 2x1000x10x2 = 40,000 weeks for 1 person. The average human lasts 4000 weeks. So 1 shop can support 10 people their whole lives. Edit. Formatting

A person on #Reddit asked if one person could survive an apocalypse with only the contents of a supermarket for the rest of their lives (ignoring expiry dates)

What was the last #FermiApproximation you did ?

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