Hi,
in a hidden row you can enter a helper, let's say row 1 so for columns 1 to
three enter

=IF(A2<"",1,0)
copy this up to column 3 and then in column 4 enter

=IF(A20,0,1)

copy to column 6



then in column G2 enter

=SUMPRODUCT(--(A1:F1=1),A2:F2)

if this helps please click yes



"mits" wrote:

Ar Bs Ec Ar Bs Ec
20 36 14 10 7

I am trying to sum the above columns. Column 1-3 supercede columns 4-6, in
the sense that if column 4 has a figure in there and so does column 1, it is
column 1s figure that needs to be included in the total not column 4. So for
the above example i would need the formula to work out 20+36+7=63.

How would i do this?