Casio HR-100TEPlus Calculator "add tax 100tm" Questions

...add sales taxes to my sales? Sorry it took so long. I had to research and this what I found posted: Traci Lopez 1 Answer Moderator Press the CA button twice. Then push and hold down the %/set key ...

...ADD OR ANYTHING HOW TO GET IT OFF Try to use the AC adapter and plug it to your household current and the calculator and the "E" should go away! Not sure if it's the batteries or just what? It ...