Today, my family of three went shopping in the mall. As soon as we go in. The shopping center is crowded with people. We bought it at once. Dad counted and said, "We bought eight things, toothbrush, toothpaste, paper towels, milk, cereal, glasses, crayons and dictionaries. We came to the cashier, and the screen showed 3.5+8+28.5+45+8.5+3.5+6+2.8 =103 (yuan). Dad looked at it and said, "Look, son. What is missing? " I found it at a glance, "2.8 yuan, why didn't it count?" I asked the receiver. The salesman said, "Sorry, I forgot to calculate!" " "She changed again, = 105.8 (yuan)

Fortunately, my dad reminded me today, otherwise I would be 2.8 yuan short. I want to remind you that you must be careful when collecting money, or you will make mistakes.