I need a help about Countif/Countifs
please look at the Attachments file,
i have data in sheet1, just say data about selling with item name (A,B,C,D) , Month (jan 2019-jan 2020), and selling count
what the formula in (sheet2) "B2", if i choose "A2" and "B1" with the option there,
it will give the result about countif "A2" when "B1" > 0 data from sheet1
thx for your help, sry for my bad english
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