The Project Landscape Report is probably the most comprehensive high level report and you can view by both task estimates and the project estimates. It can be run on one or all clients and contains different tabs showing different detailed information.
Budget & Invoices Tab
This tab will show the financial budget and value of work performed to date. In some cases, the total amount is linked to the relevant report that generated that number. In this example the amounts are linked to their respective project detail pages.
Note: hover over the amount to see what the amount is linked to.