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n. 1. A 3-digit STORE NUMBER. E.g., 321. 2. A 3-digit EMPLOYEE NUMBER. E.g., 123.

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n. A 4-digit PLU. E.g., 4011 (bananas). See PLU.

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n. 1. A 5-digit STOCK NUMBER. E.g., 12345, (i.e., a six-digit STOCK NUMBER such as 012345 with it's leading zero omitted). 2. A 5-digit PLU. E.g., 94011 (organic bananas). See PLU.