The transfer fee of 300 pieces per day at Mama Station is 30,000 yuan. Because mom's post office can handle 300 express deliveries every day, it shows that it has a certain business volume and profitability. In addition, as an operating post station, it has relatively stable customer resources and operating experience, which can better attract and retain customers. At the same time, the transfer fee of the parent station is 30,000, which is relatively low, and the return on investment is high and profitable. Therefore, the transfer fee of 300 yuan per day for the mother station is 30,000 yuan.