def extra_label(index)
      return nil if index < 1 || index > 5
      txt = send("extra_#{index}_label")
      txt = extra_name(index).to_s.humanize.capitalize if txt.blank?
      txt
    end
def extra_label(index)
      return nil if index < 1 || index > 5
      txt = send("extra_#{index}_label")
      txt = extra_name(index).to_s.humanize.capitalize if txt.blank?
      txt
    end
Gets the label for an extra value.