I am trying to use sumif to work out the problem below using excel 2003.

Sheet 1
Col A Col B Col C
1 Oct 08 C Check 10
4 Oct 08 C Check 2
9 Oct 08 A Check 4
1 Nov 08 C Check 5
25 Dec 08 B Check 1

I want to add all data in (Col C) if (Col B=C Check) AND (Col A is 1 Oct
08 < 31st Oct 08)

Thanks