Magnetic goods are not ordinary goods. Because the interference of magnetic field may affect flight safety, airlines require magnetic goods to issue a magnetic test report before they can get on the plane.

The magnetic test report has the following requirements:

1. The magnetic report is a one-time report and cannot be used multiple times.

2. If non-magnetic goods and magnetic goods are mixed, all goods must be subject to magnetic identification, not just magnetic goods.

3. The magnetic identification report cannot be made in advance. It can only be made after the goods arrive at the airport for on-site measurement. The report is issued about 2 hours.

4. The unified charge for magnetic report is 450 yuan / ticket (within 50 cases), and 1.5 yuan is added for each case exceeding 50 cases. For example, the charge for 80 cases is 450 + 30 * 1.5 = 495.