No problem! Glad to hear you found an internship with good pay!
Just another thought, maybe a smaller store would be better as you would have more responsibility and could get some business management experience out of it? The large chains generally have everything planned out so the lower employees have to do as little thinking as possible.
Working at a hardware store in high school was nice too as I could discuss and give advice about issues the customers were having with building their projects (thinking spatially/ manufacturing). These should be open after normal work hours as well.