10~ 14 yuan. The cost of self-help fast food in 20 yuan and other expenses show that the gross profit is as high as 60%, even 70%, and the profit is in 10~ 14 yuan. Different regions discuss the situation. Fast food refers to popular catering that is quickly supplied by commercial enterprises, can be eaten immediately and has reasonable price to meet people's daily needs. It has the characteristics of rapidity, convenience, standardization and environmental protection.