drill down em gráfico de barras

[#1]

Good evening gentlemen,

I have a following problem.

Attached follows worksheet with a column with the parent window and the other with the index child, I also have another column with ierárquico level, which is 7.

I am needing to create a bar graph that all veses select a toolbar such a level.

If possible add examples.

Thank you very much.

[#2]

If necessary change the spreadsheet can do.