Yes, the double minus signs tease the interim evaluated results in the
formula into a number.

I think I had a typo in the original formula, but you probably caught
it.

=sum(R20:r50) - sumproduct((--(r20:r50<c2),--(r20:r50)) -
sumproduduct(--(r20:r50d2),(r20:r50))


--
rsenn
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