I don't know the exact number of supermarkets in the school, but I opened a canteen in the dormitory. Generally, only those who buy it on our floor (all computer geeks) have a fixed number of about 20 people, with a monthly income of about 4,000-5,000 and a profit margin of 30-40% (depending on the goods, such as high water profit and low beverage profit), mainly because we have a fast turnover, and generally purchase it once every four days. Even if the spending power of computer boys is twice that of ordinary students (because computer students have at least one meal of instant noodles or bread every day), according to the year-on-year available amount of schools (if there are only two schools and there is no canteen in the dormitory, school students must buy from him), the monthly operating income is at least 50W, at least higher than this figure. Because of the large purchase volume and low cost, the profit rate is definitely higher than ours, at least above 35%, so there is one in a supermarket. Personally, I hope to help you a little ~ ~ Usually there are more boys in engineering schools and the income in supermarkets is relatively high ~ ~