If enabled by your organisation, when creating a booking you will see an entry for Booking Cost Code. 

To add a cost code to your booking:

1. Create a booking.
2. Click Booking Cost Code on the booking screen.
   
3. A screen opens with cost codes listed to apply to your the booking. Select one or more appropriate codes by clicking Include.
   
4. (optional) You can edit the apportionment of the cost codes, to divide the costs differently across multiple cost centres. Click Set Apportionment and moving the sliders to the desired percentage split, and then click Apply.
    

Now, your booking cost has one or more cost codes applied, and you have apportioning adjusted as needed.

Cost codes can also be used when making catering requests. To add a cost code to a catering request, select the Cost Code option at the bottom of the screen.

Selecting this option will bring you to the screen where you can select the cost codes you wish to use and set the apportionment.