Zack Bradley (Dane Cook) and Vince Downey (Dax Shepard), two ultra competitive Super Club workers whose ten years of employment have resulted in drastically different career paths. While Vince – with the aid of his trusty sidekick Jorge (Efren Ramirez) -- has advanced to become head cashier and winner of 17 consecutive "E of M" awards, Zack is the ultimate slacker whose scruffy appearance and laid back attitude has made him popular with his colleagues, but kept him stuck in the lowly ranks of the store's box boys. The duo's longtime rivalry comes to a bitter head when Amy (Jessica Simpson) – a beautiful new cashier with a reputation of only dating "Employee of the Month" winners – transfers to the store, immediately becoming the object of both Zack and Vince's affection and often comical gamesmanship.

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