1. You can use the cash register. The design of the cash register is that the till is locked, and the input amount is automatically bounced off and pushed back after payment.

2, you can install a camera, but there will be a long video to watch slowly, which is also very troublesome.

3. Only a small amount of cash is reserved every day.

4. Make an inventory every night, and immediately investigate any abnormal funds.

5. Basic salary+bonus for all employees, so that employees who don't register can supervise the cashier.

6. Change people to take turns to register every day.

7. If it is found, it will be dismissed and the unpaid salary will be deducted.