Due to child labor laws, most companies won't hire before 16, some won't before 18, especially at major stores, so if you are looking for a younger age, it is best to try a small local shop. Either way, just call the store and ask for the hiring manager and they will give you the details you asked for.
I feel like they are always hiring. Not sure about the pay and age, maybe 16..? That's a guess.
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