Bob,

Thanks - a great help. A couple of follow up questions:

1. What is the significance of the '--' in the formula?
2. If I simply wanted to count the number of non Blank cells in a column
based upon 2 similar conditions, what would I need to do?

Thanks for your help

Mike

"Bob Phillips" wrote:

=SUMPRODUCT(--(A2:A200="Completed"),--(B2:B200=--"2005-01-09"),--(B2:B200<=
--"2005-01-13"),C2:C200)

as an example

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

"Mike McLellan" wrote in message
...
I want to be able to add the contents of selected cells within column C
only
when the contents of the cells in Column A meet condition 1 and the
contents
of the cells in column B meet condition 2. For example, if column A
contains
Status (Completed or Not Completed), column B contains an implementation
date
and column C contains the number of printers to be deployed, then I want
to
be able to derive the total number of printers deployed where the status
is
'Completed' and the implementation date falls within a specified week.

Can anyone suggest how I might best achieve this?