I've been working loyally at a jewel in my area for 2 years and I'm soooo done with customers expecting me to help them when I'm clearly busy with other things.
I do mostly self check out, so I have to watch 4 machines and all the registers, if the people on them are under 21. If a receipt gets jammed I have to fix it, if a cashier needs a 21 I'll go get it, if the phone rings I'll pick it up.
But if you can see I'm on the phone or helping someone else, don't get pissy with me cuz I'm not helping you. I can't help you and help someone else. Stop fucking with the machine and wait til I can help you. If you can't handle that then don't use the damn thing.