Table tennis training and table tennis training in table tennis venues are more marketable. Cost and profit of table tennis training class: Assuming that the per capita consumption of table tennis training class is in 90 yuan, 32 people are sold every day, the cost is estimated to be 5 10 yuan, the daily turnover is 2,900 yuan, the monthly turnover is 87,000 yuan, the gross profit rate is calculated at 55%, and the monthly net profit is 1900 yuan. Opening a table tennis training class can earn about 228,000 yuan a year, so it only takes eight months.