You can create a custom cost profile in the section 'Cost Profiles', under 'Industry Cost Profiles'.
Below the table 'Your saved industries', you see the button '+ Create a custom cost profile'.
There, you can select an industry, region and year. After you selected an industry and region, the cost components will appear. You are then able to fill in all percentages per cost element. To do so, you can click open all components, such as direct labour as shown in the screenshot below. (Please note: The total must sum to a 100% before it can be created).
After selecting the preferred settings and entering the percentages, click on 'Create'.
It will be saved under 'Your saved industries'.