1. Enter the system backend, manage the account directory, export and save, match the system store purchase and sales, compare the sales delivery order and sales return order to see if they have been settled, and check and follow up with the warehouse and customer service for unsettled ones

2. Check whether the various expenses on the bill are accurate, and sort out the express logistics and warehousing operation fees

3. Sort out the store's income, cost, and expenses, and calculate the store's gross profit margin and gross profit