It really depends on what the manager is looking for.I wouldn't hire you, and I'm trying to be nice.
Many clothing stores actually want you to show up looking as up-to-date as you can because they can assess how you'll make the store look.
That's the problem: You don't have the job yet! Who dresses down for an interview?
People who interview at Hollister, Abercrombie, etc.
Managers specifically tell you to dress a certain way for the interview.
Give the poor kid a break Abstract; it was his first time at bat after all.