One way:

=SUMIF(A:A,"Joe",B:B)

if you want to do this for all of your salesmen, this is a perfect
application for a Pivot Table:

http://peltiertech.com/Excel/Pivots/pivotstart.htm


In article ,
JeffDamin wrote:

i have a spreadsheet that lists by salesman po's and their value. how do i
create a formula so that i can add all the rows just for a particular
salesman. i do have the drop down list on the salesman header.