If the daily turnover of Mala Tang is 1 1,000 yuan, then according to the gross profit rate of 80%, the gross profit is 800 yuan. But this is not a net profit. Diaosi Mala Tang should deduct fixed costs and variable costs such as rent, labor, utilities and miscellaneous fees. Assuming that these costs are 400 yuan every day, then the net profit is 400 yuan. In other words, the daily turnover of Spicy Tang Can is 1000, and the income is 400 yuan. This is only a simple estimate, and the actual situation may be different.