You can go to the following site and download the manual for your cash register. Then you can print it , it explains how to zero out after you Z each day. I had to get a manual from this site for a cash register, it was very helpful and informative. By printing it you can have it on hand. .http://manualsforall.com/sharp-cash-register-user-manuals.html.
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I have looked at the manual but cannot find just the right way of programming this way
What page were you on.?
I got my information from page 57 , programming the Z function. If you cannot figure it out from this, then I would call a local office machine company, try a smaller company not the large office supply companies, make sure the company you call does office machine repair etc, they will walk you through the programming. Hope this helps.