WPF data grid for financial style reporting?

I'm looking for a decent WPF data grid or solution involving one to represent financial data.

I've looked at many - the WPF one, XCeed, Ingragistics, DevExpress, etc.... but none of them seem to offer the simple requirement I have:

I want to be able to display group subtotals in their columns in the group row, e.g.

GROUP 1           xxxx.xx   
  GROUP 2         xxxx.xx
    ROW 1           xx.xx
开发者_开发知识库    ROW 2           xx.xx

Does anyone know of a grid that does this, or a nice supporting collection that implements aggregate functions (group totals would need to be used in individual line items) so that existing grids with a bit of XAML styling would work?

Thanks in advance, Stephen

Check out ViBlend DataGrid

Do you need a PivotGrid? If so, take also a look at the DXPivotGrid for WPF