Hide legend items in a LINE graph when associated value = zero or blank

I have been searching this site for an answer to my problem but found one solution for a pie graph. I am looking for a similar solution for a LINE graph. Attached is what I found. It works beautifully but the formulas are not for a row of values. I am referring ONLY to the formulas which are used in the Name Manager. In step 4 of one of the attachments, is where my problem lies. I hope you guys will be able to follow this and really try to help me. Thanx a lot..