Hi,

I'm facing a problem in using excel worksheet functions.
I need to sum up all number that fall on Dec and with colA of 1001.

meaning i need to add up B2+C2+D2+B7+C7+D7. I use the following formula but
can't get it. Anyone care to share with me which part I did wrong.

=SUM(IF(AND(B1:F1="Dec",A2:A11=1001),B2:F11,0)) which return #Value!.
I understand that if i use SUM(IF(, I have to press CTRL + SHIFT + Enter and
this return me with 0.

Can I know where I went wrong and how should I add the fill up so that I can
achieve B2+C2+D2+B7+C7+D7 = 16??

A B C D E
F
1 29Dec08 30Dec08 31Dec08 01Jan09 02Jan09
2 1001 1 7 1 1
1
3 1002 2 2 2 2
2
4 1003 1 1 1 3
1
5 1004 6 1 1 1
1
6 1005 1 1 1 1
1
7 1001 3 2 2 1
4
8 1002 1 1 1 1
1
9 1003 1 1 1 1
1
10 1004 1 1 2 1 1

11 1005 1 1 1 2 1