Help? I Have An Interview

Hello, I’m not worried about my skills and experience and I’m pretty sure that I could land the job— if I’m what they’re looking for.

The issue lands on money.

How much does a Dollar Tree pay Cashiers, Sales or Lead Sales associates? (I’m in South Carolina, close to the Greenville area)

I don’t know what to say or how to ask about it in an interview without sounding unprofessional. How do I mention, “what is the highest you’re willing to pay” or bring that up?

Because if I’m lowballed in this economy and it turns out being like $12hr give or take— I could’ve worked at Panda Express paying me $17hr. I would be content at 15 as a college student, but nothing less. And if they’d be willing to pay more, even better.

Help?