"Checking out?" The boss ran over with a smile, "Four hundred and fifty-six in total, and excluding the change, I'll charge you four hundred and fifty. Cash or credit card, please?"

"Boss, may I ask how to recognize those words on the wall?" Mu Yu asked, pointing to the middle of the hall.

"Children and gentlemen ah," the boss smiled with confidence, "Little girl, you can rest assured that we open the door to do business, absolutely will not do things to deceive the customer, are ...