Cashiers Not Knowing How To Ring Up Classes

Anyone else having this problem? The other instructor for cake decorating & beading and I are getting really frustrated with the cashiers. She had a student say that they act irritated when you want to sign up. I had a lady who wanted to sign up for the purl class and they said I didn't offer it, even tho it's in binder and on the calendar.

We discuss to we wish they would push the classes more too. If you see someone buying yarn mention that we have knit and crochet classes. We were thinking maybe we should do some sort of incentive thing. I know the manager should be doing something about this.