Yes, it does make sense. The first 3 terms of your product are either 0 or
1, depending on whether the boolean was FALSE or TRUE. The triple unary
minus for your fourth term turns FALSE to 0, and TRUE to -1.
--
David Biddulph

"PAL" wrote in message
...
Any idea how the output would be a negative number? I think the value is
right, but the negative doesn't make sense. Thanks.

=SUMPRODUCT(--('Enroll I'!A$2:$A$2921=$B67),--('Enroll
I'!$O$2:$O$2921="NSITE0"),--('Enroll I'!M$2:$M$2921="Yes"),---('Enroll
I'!N$2:$N$2921="Yes"))