Replying to Job Interviews

So the other day, I went into Abercrombie to help my sister pick out a skirt. Mind you, I was in boxers and a tank top with my bikini on underneath, no makeup and my blonde hair was crazy wavy/ not brushed/ en route to the beach. So I looked like a lunatic, basically. This guy comes over and starts talking to me and then offers me a job working there.
So even though I dont wear Abercrombie and spent the whole time til he offered me the job making fun of the people who work there (they're in a cult, i swear) I have an interview tomorrow. I own no AF clothing and have never worked a day in my life.
What kind of things can they ask me? I could ace a pageant interview but not a work interview. What shoudl I expect? Also, since its at AF, what the fuck should I wear?

guy at SkiShop SC to me: "Why is there sand in your bindings?" "If you're alive, I probably hate you." -C. Francis Browning (my friend CeCe)