This happened to me years ago i got extra 500 bux on my paycheck. I didnt report it, but eventually i was notified they were going to tak back payment. Not sure what the term is but it was like a chargeback on my account. Why was this discrepancy not caught by sup/manager/payroll? Maybe fire them instead

You mentioned there is no competition (movie theatres) within 30 miles. Great. Are there internet providers in your area? Guess what, theyre the competition. Unless theres a hot release like barbie or some jump scare film, expect only horny teens who cant even afford a bucket of popcorn or senior citizens bitching about how their senior discount shouldve included a small soft drink.