GroupBy and aggregate functions

When grouping on data in the grid control, is there a way to get a sum, avg, etc. on that data?



e.g.



PURCHASEDATE ITEM PRICE

01/12/1999 Peppers $9.00

01/12/1999 Pepperoni $10.00

01/15/1999 Grapes $2.00

01/16/1999 Squash $4.00





If I group on the the “purchasedate” field (GroupBy(0);), my grouping header will show as:



01/12/1999 (2)



I would like for it to display the sum of the “price” column at that date - $19.00.

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