If anyone needs a manual, try c-tech collective
Sharp ER-A320 operation manual:
http://the-checkout-tech.com/manuals/cashregisters/Sharp_ER-A320_instruction_manual.html
Sharp ER-A320 Programming manual (USA version):
http://the-checkout-tech.com/manuals/cashregisters/Sharp_ER_-A320_programming_U_and_A_ver_manual.html
Sharp ER-A320 Programming manual (Other areas):
http://the-checkout-tech.com/manuals/cashregisters/Sharp_ER-A320_programming_manual.html
Registerman
September 2011