Well Bird, i've tried your formula and it seems that it doesn't work. I have another speadsheet to show you the testsheet that I going to try to uses, and maybe you can look at the formula to see what i'm trying to acomplish. Please review.
http://cid-03d2da80fac69eb8.skydrive...TESTSHEET1.xls
P.S. I notice the COUNTIFS formula, but does it matter if the version of Excel plays a factor in this?