how can i fix my model ex-a213?

Turn to program, press the PLU to change, SUBTOTAL, new price, SUBTOTAL, Total.

The balance will be out if you have had over-rings or you don't reset the report at the end of the day.

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If anyone needs more information, the Sharp XE-A213 manual is here:

http://the-checkout-tech.com/manuals/cashregisters/Sharp_XE-A213_operating_programming_manual.html

Registerman
October 2011