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Trader Joe is owned by one of the two German Aldi groups (two brother split original business to have one each) And both of them employ the same model globally.

They are huge - ~15,000 stores worldwide and growing fast

https://en.wikipedia.org/wiki/Aldi

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Trader Joe's stores are tiny compared to Costco, and only sell food.
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> unlike at a conventional grocery store, nothing is sold by weight

Costco and TJs both sell items like meat by weight, they're just pre-labeled so they can be scanned rather than weighed at the register. Things like produce that might be weighed elsewhere are sold by each or container though.

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And regular grocery stores like Kroger do much the same thing. Aside from picking out individual produce items, and even then a lot of times it is per-item pricing. Nearly all of the by-weight stuff is pre-labeled
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