I am struggling to create a k factor bend table I have tried my variations but it keeps erroring saying can not create k factor.

I have a gauge table which works for the material thickness and actual radius

I have been trying to create the k factor bend table to make the k factors auto populate but the table keeps failing.

Any guidance in this would be greatly appreciated.

I also want to create a data table that links to thickness and k factor if that is possible, but that is the second part for this project.