Cost codes are used to allocate sales, purchases and internal transactions to a specific area of the business.
To manage these, go to System Setup > Finance > Setup Cost Codes.
Click Add to create a new Cost Code, enter the name, and Save.
This can then be assigned to products, customers, booking locations, tills, etc to categorise transactions.
Note: If using Booking Locations, a cost code is required per location for Recognised Revenue.
A default Cost Code can be assigned to a product via the 'Default cost code' field on the product page. This will then be used for any orders and invoices containing that product.