The following formula should return 15 in each of the cells E3:E6
. It should sum column labeled X but not include any numbers in this sum if they are found in column D
.
Note: no additional helper columns are allowed, but the Total
cells C8:D8
can be used.
=SUMPRODUCT(ISNA(MATCH($C$3:$C$6,$D$3:$D$6,0))*$C$3:$C$6)
MATCH
returns an #N/A!
error when it can't find the lookup value (X) in the lookup array (Y). ISNA()
converts matches to FALSE
and non-matches (#N/A!
) to TRUE
. When multiplied using the mathematical operator *
, TRUE
becomes 1 and FALSE
becomes 0. SUMPRODUCT
finally sums up the X's that line up with 1's (and not those with 0's).