Connect to the Sample - Superstore data source, which is included with Tableau Desktop. Click the drop down to the right of Dimensions on the Data pane and select Create Calculated Field to open the calculation editor.
more info on tableau : https://goo.gl/7Y5bwi
While we are not familiar with how Tableau would run these calculations as it is a separate program from TrackVia, it would be possible to connect TrackVia to Tableau using the API.
Reports like the one attached can also be generated within TrackVia as well, depending on how your application is structured. We recommend using a Summary chart type to mirror the format of the report in the screenshot. More information on charts can be found in our Knowledge Base article: http://help.trackvia.com/knowledgebase/topics/40972-views-charts