How do I set an extra fee when adding guests in the room?

Action:  Login System> Configuration> Room Type> Price Configuration

Choose Price Configurations to set additional prices for additional guests in the room

>> Choose 2 to add a price setting overnight

> Choose 3 to delete an overnight price setting

Price used when adding adults

Example: Each room is suitable for 2 adults. Maximum number of adults allowed in each adult is $4.65

You can do so with an additional child in the room.