What to audition with at my agency?

I have to go in to my Agency [Neal Hamil] and audition a script to get into the acting part of it all, I'm only in modeling right now. I'm not sure what I'm supposed to do though.. At first the guy had said a monologue, and then he said a 15-30 second commercial.. Unless they're like the same thing then I feel kinda dumb asking this, but oh well..