=SUMPRODUCT((ISNUMBER(Y!$1:$3))*(Y!$1:$3<=Z!A1)*(X!$B$1:$B$3="T"))
=SUMPRODUCT((ISNUMBER(Y!$1:$3))*(Y!$1:$3<=Z!A1)*(X!$B$1:$B$3="T"))
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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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