Once the Project Cost Calculation is done for the entire project, only the cost calculations related to them are displayed under the relevant tabs of each WBS project's "Financial" tab -> "Cost" tab.
Here again, after pressing the "New" button, you can also calculate the total project cost.
Please note that if you perform this cost calculation for a project WBS under the "Financial" tab -> "Cost" tab, you will still calculate the entire project cost, but you will only view cost information for that project WBS for which the calculation was performed under the "Cost" tab. Even if this calculation was performed under the "Cost" tab of one of the WBSs, you can view cost information for the entire project under the project's "Financial" tab -> "Cost" tab.
To learn how to calculate project cost and view calculated costs, please see: Project Cost Calculation .