Boys and girls have different appetites;

The canteen in the school is different from the canteen outside;

At present, the cost of breakfast is generally in 3 yuan -6 yuan (soybean milk, steamed stuffed bun, porridge, bread, etc. ), and the lunch fee is about 10- 15 yuan, and the canteen fee is 6- 10 yuan, which is generally enough. Dinner is similar to lunch, but porridge is cheaper. In this way, the cost of a day is between 20 and 30.