The first day I started, the manager was in a bad mood because one of the cashiers had quit and walked out. Which I completely understand, that's frustrating. What I don't understand is why she is always in such a bad mood every day. Today just pushed me right over the edge. I worked a five hour shift, and accidentally charged someone for the wrong item (We are required to memorize all produce codes) I typed in the code for wax beans when the person was buying bean sprouts. None of the cashiers have been trained to do refunds, as the person payed with her debit card, so one of my colleagues said they would go get (manager). I told the person I was very sorry and they were completely understanding. (manager) came over to my till, looking rather PO and I explained my mistake to her. If she doesn't want to be bothered coming out every time someone makes a mistake, why doesn't she take the time to train everyone, properly, to fix them? Later in the day, another of the cashiers left crying. I have no idea what happened, just that this person will not be able to take their shift tomorrow. One of the more experienced cashiers was going about asking if anyone would take it. I have already worked two extra shifts and came in early on request this week and have made plans for tomorrow, so I politely declined. When I was finished, I was putting my hours into my phone when the manager came into the office repeating the f word a few times, shoved my out of the way and slammed this weeks schedule back on the wall, then stomped away muttering about having the cover everyone's (insert f word here) shifts, and something about everyone taking time off. Then grabbed her purse and coat and left. I have already requested to have next Saturday off, I have family coming over and I have worked every Saturday since starting. I think it's fair that I can request to have one day off. I did not like the way my manager acted and presented herself today, and I am no longer happy with the job that I have. I want to quit as soon as I get another job, how would I go about quitting? What would I say?