Why do people come into the laundromat with a $50 bill 🤦 we aren't allowed to take anything over a…

Why do people come into the laundromat with a $50 bill 🤦 we aren't allowed to take anything over a $20 because of all the counterfeit money that was going around. Then when I tell them I can't make change for them they get all pissed at me 🤷🤷 not my fault sorry we have rules. I tell them go nextdoor to the supermarket and ask them for change and they look at me like I have 10 heads