Gridview row having multiple record

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VB

ASP.NET

I have a stored procedure that retrieves employee information - I don’t want to edit this stored proc because it is globally use with in the website.
Here is now my dilemma, how can I put multiple row records in a column in the grid view. Is Gridview powerful enough to my scenario below or I really need to edit the store proc or my copy of it. Thanks
Record Retrieve by stored proc

Employe_ID  	Purchase ID  	Amount 
1	           0123456	          100
1	           012356  	 560
1	           012446	          560
1	           012126	          560
2	           011122	          100
2	           051122	          200

I want to achieve this in gridview
Employee ID	Purchase ID	  Total Amount
1	           012345                 1780
                    012346         
                    012446 
                    012126         
2	           011122                  3000
                    051122