How to present a computed column in a pivot chart?

[GIS2013]

Hi. I'm having problem with making the pivot chart tool to present a computed column. In the attached file I want that automatically the result of C/B would be presented in the chart. But when I try to define C as C/B it delieves N/A. Need your help. Thank you.

[judgeh59]

Hello.....I'm not sure if you mean an actual calculated Field...the file you uploaded didn't have a Pivot Table....so I made some assumptions...see if it is what you are looking for....

[GIS2013]

Thank you for your help. You've mentioned that my file having no pivot table in it. This is correct, as I wrote I was trying to use pivot chart rather than pivot table. Anyway, I may find a solution which evolves a "calculated field".