For the first formula use.

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

For the 2nd and 3rd formulas, substitute c3 and c4 for c2, and d3 and
d4 for d2.


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rsenn
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