I need a user manual for sharp model XE-A110?

No problem. There is one here:

http://the-checkout-tech.com/manuals/cashregisters/Sharp_XE-A110_operating_manual.html

or programming manual here:

http://the-checkout-tech.com/manuals/cashregisters/Sharp_XE-A110_and_XE-A130_programming_manual.html

Just copy and paste the link into your browser and you will be taken to the page.
Once you have the manual, just let me know if you have any trouble and I can talk you through the sections in the manual

Registerman
July 2010