So I did an interview to sell guns at a gun store at the Smith and Edwards store in Ogden, UT. The interview is going great till the guy asks me what days I can work I said that I can do Mon-Fri. This mf, says that since it's a retail store they want me to do Saturdays, so to not mess up the interview I quickly go back and say that I'm willing to do every other Saturday. The dude doesn't budge so I say fine, whatever. Is it possible that if I do get hired that I can negotiate the days of my work?