Besides selling accommodation you can also sell extras and sale items in the Booking Engine. They will appear after the guest has chosen the desired room, as you can see in the image below:
In order to offer extras and sale items in the Booking Engine you have to access Property Settings > Booking Engine > Settings, click on "+ Add Item" and choose among the items you have previously set up in the Item Manager:
The item can have different price types:
Per Item - The guest can choose how many items he wants.
Per Stay - Only one item will be added to the reservation.
Per Person Per Stay - The amount of items will be the same as the number of guests.
Per Night - The amount of items will be the same as the number of nights.
Per Person Per Night - One item will be adde for each guest for each night he stays. If there are 2 guests and 3 nights, 6 items will be added.
Here you can see how to set up the item price types: Setting up sale items for Point of Sale