=SUMPRODUCT(--(A2:A10=""),--(B2:B10="Davolio"),C2:C10)
=SUMPRODUCT(--(A2:A10=""),--(B2:B10="Davolio"),C2:C10)
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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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