Conditional sum
1999-08-14 Sum 0 180
With the worksheetfunction SUMIF() it's possible to return the sum of all cells in a given range that fulfills a given criteria.
The function =SUMIF(A1:A100,">1000")
will return the sum of all values in the range A1:A100 that is greater than 1000.
The function =SUMIF(A1:A100,">1000",B1:B100)
will return the sum of all values in the range B1:B100 that has an adjacent cell in the range A1:A100 that is greater than 1000.
You can also use the COUNTIF()-function in a similar way to perform a conditional count.