I'm trying to sum all of the data in column D that have either a yes in the primary or secondary category, but only include the first instance of that value. In the example below, the sum would be 3 (1 for A, 2 for B). Please help!!
Area Primary Site Secondary Site Value
A yes no 1
B yes no 2
A no yes 1
C no no 3
use:
=SUMPRODUCT(((($B$2:$B$5="yes")+($C$2:$C$5="yes"))*$D$2:$D$5)/((COUNTIFS($A$2:$A$5,$A$2:$A$5,$B$2:$B$5,"yes")+COUNTIFS($A$2:$A$5,$A$2:$A$5,$C$2:$C$5,"yes"))+(($B$2:$B$5="no")*($C$2:$C$5="no"))))