Whenever any of the customers are buying anything, Dante never rings them up on the register. He just takes their money, put its in the register, and give them their change.
I believe throughout the film that it shows that as time progresses, Dante cares less and less about doing things right, he obviously doesn't care. I believe at one point he lets people pay and take their own change on the theory that people will be honest when they think they are being watched..all in all it shows a very slack attitude when it comes to the dealings there
I've noticed this also...course he could just be pissed that he's working an open-to-close shift on his day off and doesn't care if the items get rung up or not.
Hey, you'd think that after working how long in a corner convienant store you would know the prices like Dante does with the "chewleys" gum, the paper and other things and do the math in your head, also those operations are not big enough to keep perfect records because they're usually a "mom and pop" operation that don't care about $0.35.
If you actually pay attention the cash register doesn't have one of those laser eye bar code readers. He just has to remember prices and no one even buys anything that takes actual thinking they just buy cigarettes gum a slim jim milk a paper and coffee. When the whinny guy who got mad about them using dirty language his stuff was rung up and in a bag.
I just think that thing about the "packet of cigarettes" is brilliant cos I used to work in a place like that and every second person would walk down to the store in bare feet and shorts and buy a pack of smokes... so many people did it, and I have a feeling it was a bit of an in-joke for people who work in that kind of place.
Okay, to state the obvious, they are in an operational store. If they rang up the people in the movie (for every take that they had), it would throw off the sales of the store.