=SUM(IF(ISNUMBER(A1:A10),A1:A10))

which is an array formula, it should be committed with Ctrl-Shift-Enter, not
just Enter.
Excel will automatically enclose the formula in braces (curly brackets), do
not try to do this manually.
When editing the formula, it must again be array-entered.

--
HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)

"Mark R" wrote in message
...
Hi,

i am auto summing on a range of cells. soome of the cells do not have
figures in yet but do have formulas that return #NA at the moment.

How do I ignore those cells until they have data in and only count the
cells
with figures

i.e
1
1
#N/A
#N/A
#N/A
#N/A