
Originally Posted by
XOR LX
"I would not recommend to use thw whole column range as it will slow down calculation but if you insist you can use C:C and D:D."
Generally, yes, though as I understand it, one of the advantages of the SUMIF(S), COUNTIF(S), etc. family of functions is that they calculate the UsedRange only; hence no loss in performance is typically associated with referencing entire columns.
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