Go to the :
- PERSONNEL section
- the ROLES tab
You have the different roles to allocate for each user.
To do so, select an user then "drag and drop" to the role.
Once you have done that, click on MANAGE RATES.
Set the BILLABLE RATE for each role. The PAYABLE RATE is adjusted according to the users.
You can still drag & drop the user to the BILLABLE USER if necessary.