For example, 30 days a month, breakfast is 5 yuan a day, lunch is 12 yuan, and dinner is 15 yuan, which is 32 yuan a day, plus 3 yuan of water, which is the minimum consumption of meals. A month 1050 yuan, plus going out for dinner once a month 100 yuan, online shopping 100 yuan, and having a snack occasionally 100 yuan. Plus the monthly dormitory water, electricity, bicycle phone bill, etc., the scattered expenses are 200. That * * * is 1550 yuan. This is the minimum consumption under normal circumstances. In addition, you may need to buy books or equipment for professional reasons, which is an extra expense and not a small expense.