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In page Cash register:

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An often used non-sale function is the aforementioned "no sale". In case of needing to correct change given to the customer, or to make change from a neighboring register, this function will open the cash drawer of the register. Where non-management staff are given access, management can scrutinize the count of "no sales" in the log to look for suspicious patterns.[citation needed] Generally requiring a management key, besides programming prices into the register, are the report functions. An X-report will read the current sales figures from memory and produce a paper printout. A Z-report will act like an "X" report, except that counters will be reset to zero.[citation needed]