Not to looking forward to tomorrow

I was off today (November 1). All the Halloween stuff is likely on sale. Customers never understand how the sale works. Something was originally 5 bucks. Half off would be 2.50. They think 50% off means that the thing will ring up at half off and then the cashier is supposed to take another 50% off of that price. I really don't know where these people went to school and why they think I'm as dumb as they are.