I have the following problem

Todays Data
Col A Col B Col C Col D
Oranges Bananas Total Oranges & Bananas

Tomorrows Data
Col A Col B Col C Col D
Oranges Pears Bananas Total Oranges & Bananas

I use a find to see which column is holding Oranges & Bananas, this is
working fine. However I want to refer to the whole of Column D as a range
and fill this range with the formula. Can anyone tell me how to enter the
formula in the code
eg. Range("D" & ActiveCell.Row & ":D" & iRow).Formula = iCol + iCol