Landing Page Grouping and Totalling
Grouping can be used on any field on a Landing Page to create a sub-totalled style report. In the example below we have a Salesperson set against each account. By Right clicking on the SALESPERSON field header, we then select Group By This Field.

The Groupings can then be Expanded or Collapsed by right clicking the row depending on whether a summary style view or a detail view is required. The screenshot below shows a summary view.

The screenshot below shows a fully expanded view with subtotals for values against each Salesperson.