Column A has mixed dates "m/d/yyyy". I want to sum the associated data in
Column B for each m/y. Sample layout below:

Column A Column B
8/31/2007 5
8/31/2007 15
1/30/2007 10
1/30/2007 20
6/28/2007 30
6/28/2007 10

I want to pull this data into a new file that will have results for Jan
2007, Jun 2007, and Aug 2007. I need the right sum formula, not a macro.