Hi

I am finding a solution (formula) to automatically sum (3 or 12) cells
on the right after encountering first right cell greater than 0.

Currently, this is done manually. (eg. 3.9 is the sum of 2.9 (Aug) +
0.5 (Sep) + 0.4 (Oct).)

Question is there a way to do this automatically because there are
thousands of rows..and this will drive me crasy in maintaining this
worksheet effectively. Thanks.

First First
3M 12M Jul Aug Sep Oct Nov Dec ....................
-------------------------------------------------------------------------------------------------------------------------------------------
3.9 5.4 0.0 2.9 0.5 0.4 0.3 0.2 ....................
1.0 2.2 0.0 0.9 0.0 0.2 0.0 0.4 ....................
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ....................
3.2 5.2 0.0 0.0 0.0 1.9 1.3 0.9 ....................
3.1 5.1 0.0 0.0 0.0 0.5 1.7 0.9 ....................
2.6 3.9 0.0 0.0 0.0 0.4 1.1 1.1 ....................
........................
........................

Ivan