I have this simplified data structure on worksheet1:
A B C
date red blue
01/01/2006 300 100
01/02/2006 200 200
..
01/31/2006 300 300
02/01/2006 100 100
..
02/28/2006 400 200

On worksheet2
A B C D
Item 01/06 02/06 03/06

red ???? ??? ??
blue ???? ??? ??

I am looking to sum all of red by month/year and all of blue by month/year.

Thanks!!