Bind a chart to 3 data items from a database

I'm trying to bind an ASP Chart control to the output of a database query. I have a database stored procedure that returns a datatable of data setup generally like this:

Items Date Volume Beer Jan 100 Chips Jan 50 Popcorn Jan 25 Icecream Jan 35 Beer Feb 75 Chips Feb 40 Popcorn Feb 22 Icecream Feb 20 Beer Mar 80 Chips Mar 28 Popcorn Mar 45 Icecream Mar 16 Beer Apr < ...