I keep getting an error when writing this formula. Can someone please help?
I want to sum the "Weighted Range" when "Prob Closing" is checked (1), and "Close Date" is January (1) of 2020.
The 3 columns are in another spreadsheet.
=IFERROR(SUMIFS({Weighted Range}; {Prob Closing}, 1; {Close Date}; MONTH(@cell) = 1; {Close Date}; YEAR(@cell) = 2020); 0))