Open a wheel cake shop in Chengde to make money. Opening a 30-square-meter wheel cake shop in the urban area, the monthly rent, salary, utilities and other miscellaneous expenses are about 6,543,800 yuan, of which the daily turnover is 2,400 yuan and the monthly turnover is 72,000 yuan. According to the gross profit margin of 65%, the monthly net profit of the city's participating wheel cakes can reach 33,000 yuan, and the annual profit is as high as 396,000 yuan.