Use
=SUMPRODUCT(--(B1:B100="Bob"),(C1:C100))

This will sum up Col C values where corresponding cell in Col B is Bob.
Adjust 100 to the last row with your data...

Put you saelpeople in, say, Col D and enter this in E1
=SUMPRODUCT(--($B$1:$B$100=E1),($C$1:$C$100)) and copy down

"DMB" wrote:

I am trying to find a formula that can sum the value of a cell if it contains
a certain value.

For example:

I have 100 sales that were made and 10 sales people. Each sales person has
different sales $$ volume that they done. So I want to find the TOTAL sales
volume for each sales person.

Their sales volume is in one column and their name is in another. I need a
formula that will give me the toal volume for example sum C2 if B2 = Bob.

Thanks.