I forgot to mention... if there is no zero anywhere in Column A, the formula
returns the sum of the entire column. If you don't want that, or if you know
there will always be at least one zero in the column, you can use this
shorter formula...

=SUM(A:A)-SUMPRODUCT(A1:A999*(MATCH(0,A:A,0)ROW(A1:A999)))

which will return an #N/A error if no zero exists in Column A, otherwise it
works the same as the first formula I posted.

Rick


"Rick Rothstein (MVP - VB)" wrote in
message ...
You post is not clear if A7 will always contain the last number in the
column or if that was simply used for example purposes. Here is a formula
that doesn't care...

=SUM(A:A)-SUMPRODUCT(A1:A999*(IF(ISNA(MATCH(0,A:A,0)),0,MATC H(0,A:A,0))ROW(A1:A999)))

As long as there are less than 1000 values in Column A (increase the 999
if you need to handle more values), it will return the sum from the
**first** zero it sees up until the last number in the column.

Rick


"Curtis" wrote in message
...
If I had column A with numbers; like if A1=15; A2=10; A3=12; A4=5; A5=8;
A6=10; A7=10 when I sum all this together it total to B1=70. Question is
if
A6=0 and rest are the same then b1=10, what I trying to do is if there
any
zero then it only add after zero not before. If A5=0 then A6 and A7 adds
to
20, any help on this?