1. Check whether it is wrong: the unit price of zero may be caused by a mistake or omission. You can carefully check whether the information filled in is correct.

2. Contact the supplier to confirm the unit price: If the unit price cannot be determined, you can contact the supplier to confirm the unit price to ensure the accuracy of the order information.

3. Fill in a reasonable estimate: If the unit price cannot be determined, you can fill in a reasonable estimate according to the market situation or historical purchase records, so that the order can proceed normally.