XLS Formatter - Format a column title under conditions

Hi all,

I have a table with two columns with the title A and B.

In each column I have integer values.
Now I want to apply following rule: If the sum of column A is greater than 0, the color of the column title should be yellow after the export. The same for column B.

I know there are XLS-Formatter but it was quet hard for me to apply the rule…can I do it in KNIME?

Kind regards. T2H