The next time someone pooh-poohs proofreading, show him this story.

New York City transit officials printed 80,000 subway maps that listed the wrong minimum cost of a pay-per-ride card—$4.50 instead of $5. Recently, the city’s transit authority hiked the price for the card by 50 cents.

Officials reportedly panicked and pulled the maps.

According to the New York Post, the fare for correcting the mistake: $250,000.

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