Snack bars should be prepared to raise prices. What slogans can make customers understand?

I'm in business, so don't put up signs. This is a no-no, some people will leave when they see the signs. When you check out, customers will definitely complain about the price increase again. You must never tell customers about other reasons, such as the increase in rent. I'm very sorry. All the ingredients you bought recently have gone up in price, and you must know that if there is any change in the checkout, you will touch it off for others. So you won't ask again when you come to spend next time! You can ask me if you don't understand the food business!