Hi,
Supposing that the column headers (i.e., months) are in Row 1 (starting at
Column A), and the data (e.g., 100 under Oct-04) are in Row 2, enter the
following formula in A3,
=SUM($A$2:A2)
and drag the formula across Row 3 to as many columns as you want. The
cumulative totals will show up in Row 3.

Regards,
B. R. Ramachandran

"Dave" wrote:

Is there a way to write a cumulative formula so when it is copied across a
row it sums the prior data in another row? For example:

Oct-04 Nov-04 Dec-04 Jan-05 Feb-05 Mar-05 Apr-05
100