Before founding Amazon, what surprising career move did Jeff Bezos make that later influenced his retail approach?

Jeff Bezos transformed Amazon from a simple online bookstore into one of the world's most valuable companies. Behind his success lies fascinating decisions, pivots, and strategies that changed retail forever. This trivia question explores a lesser-known but significant moment in Bezos' early entrepreneurial journey that helped shape his retail philosophy.

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He worked as a cashier at Walmart to study retail operations firsthand
He left a lucrative Wall Street job at D.E. Shaw to start an online bookstore
He created an unsuccessful brick-and-mortar bookstore called 'Cadabra Books'
He developed inventory management software for Target's early e-commerce efforts