Surprising Zeros in Charts

My model is built.
Using #N/A - my chart displays perfectly, zeros suppressed.
This formula is what feeds the values in my chart series.
=IF(ISERROR(((AVERAGE(SHEET1!BE2:BM2))*(100/5))),€�€�,((AVERAGE(SHEET1!BE2:BM2))*(100/5)))

If I alter that error handling
to:=IF(ISERROR(((AVERAGE(SHEET1!BE2:BM2))*(100/5))),"#N/A",((AVERAGE(SHEET1!BE2:BM2))*(100/5)))
Zero still displays€¦
If I may ask €“ how would I alter this formula to function they way I hope it
would?

Sincerely,
Arturo