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What do the four individual Walmart receipt codes of "O", "T", "X", and "N" denote?

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marked as duplicate by ChrisInEdmonton, Chris W. Rea, NL - Apologize to Monica, Noah, Dheer May 12 '16 at 17:03

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    I'm voting to close this question as off-topic because it is about walmart receipts, not personal finance. – ChrisInEdmonton May 12 '16 at 14:43