Well you have to have logic to determine what the cell is in that case. The Robot isn’t expected to know that unless you do.
If the cumulative total column is the last one, it makes this task that much easier. In this case you will need to read the top row of that table into a DataTable, and the number of columns will help you determine which cell is the Cumulative total column.
Example: If the total number of columns in your DataTable is 4, then the last column is D.
You can use this information to apply the cumulative formula to that cell.
Thanks