Employee Discount - Sharp UP-700

I can see the point of doing the discounts this way security wise but, what a hassle!

Yea, need to make sure both item and it's department are set for group discount 1/2/3. Why on earth did Sharp make that error "Entry Error"? Couldent be bothered to put a better error?

From what i've seen of North American Sharp tills, their base programming is a bit unusual to say the least compared to the UK ones.