Clicking the fifth button in the Primary Toolbar takes you to the Report View.
This view provides access to a range of Reports for your project.
You can use the buttons in the top right to change which Report is shown along with sorting options:
This View creates a Summary of each Buildings Usage. All Zones are summarised collectively at the bottom of the Report
This View creates a Summary of each Usage Type, indicating which Building/Zone has the applicable Usage.
You have full control over the reporting Units in the Project settings where you can select your preferred unit and level of rounding.