=SUM(IF(ISNUMBER(A2:A20),A2:A20))

which is an array formula, so commit with Ctlr-Shift-Enter, not just Enter

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HTH

Bob

"Dyer" wrote in message
...
My question is how due I sum all values in a column that have a numerical
value, and exclude the data in the same column returned #N/A. For example
the database hase the following data;
19.40
17.93
#N/A
2,002.41
322.82
#N/A
8.39

I need to sum over 3888 cells in one column to get a grand total of
values,
not #N/A.
Thanks for the assistance.