I'm using a grid with GroupingView, and also HybridSummary for each group, which is great. However, I need a summary for grand totals (of all the groups).
Example, data in the grid is grouped by product type, and each group has a cost column, so each group also has a summary row for total cost.
So somewhere, somehow I need to display a grand total for cost, as well as other columns like qty, etc. Any ideas how I might go about that?