Barnes and Nobles job descriptions?

Im looking to apply to barnes and nobles, love that store lol. Im either looking at Bookkeeper or Head Cashier. I've read their despcriptions but I was looking for a description of more so what their average day at work is.
I don't really understand what a bookkeeper is doing, and where they are most of the time. Are they freely walking around? Are they behind a desk at the book look up cpu? Are they stacking bks? Do they get trained to learn a section?
And for a cashier… From my experience working in retail i hate doing returns and such. I know a book store would be easier than clothes, but is it hard? Are you telling a manager everytime you need to do a return or exchange?

Thanks!(:

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