See http://www.xldynamic.com/source/xld.SUMPRODUCT.html for a detailed explanation.
See http://www.xldynamic.com/source/xld.SUMPRODUCT.html for a detailed explanation.
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Nihil simul inventum est et perfectum
Abusus non tollit usum
Last night I dreamed of a small consolation enjoyed only by the blind: Nobody knows the trouble I've not seen!
James Thurber
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