PLU and department Casio TE 2000

Hi.
Your machine comes standard with 24 department buttons on the keyboard, and PLUs by memory location. It is hard to explain simply, but the basic idea is that a department is designed as a category key, and a PLU (Price Look Up) is designed for specific items with an attached price. As your machine has a pricing function for departments, you really don't need PLUs on such a simple machine.
What I'm really saying is the keyboard has departments on it which can be set with a name and price so that they can be one touch buttons to bring up name and price with a touch, or you can have them open price (where an item has no preset price, so you type the price each time). If you need a lot more than 24 item buttons, you will have to do the rest by code numbers, as this is only a basic machine.
Just let me know how many items you wish to enter into it, and I'll tell you how to program it.

The tables you are referring to with a+b=c etc. are the machine features, or system programming. These are the important settings that tell the machine what things to print, how the function keys will operate, security settings etc. These are mainly for us dealers, as they are written in tech speak as you can see. I don't recommend changing any of them unless you need to, as you can get into a mess. If you tell me anything that doesn't work how you would like, I can help you to set the machine features where necessary.