Thanks, silver_queen.

That sounds quite similar to the training I'm supposed to be getting. They didn't say how long the person stays with you, but by the sound of things there's usually a team leader or someone similar hanging around, so that's good. (For the customers as much as the staff - the store where I'll be working has recently added a couple of self-service checkouts, and although they tried to make them as simple as possible people still keep having problems...myself included! Think I've got the hang of them now, though. )

Is there a book of the codes, or do you have to learn them? My memory's terrible...