The weather is hot in summer, and the canteen is a place where students must go at noon. If you sell ice powder in the canteen, the sales volume must be high.

The production cost of ice powder is low, and the demand of students is large in summer. If you want to make money, this is a good choice. When students quench their thirst, you also make money, which is a double whammy. However, the business in the canteen must be unified by the school, and the quality of food must pass the customs.