Error message

• Notice: Undefined property: stdClass::$discount_percent in include() (line 110 of /var/www/clients/client0/web97/web/sites/all/themes/marcapelli/templates/node--product.tpl.php).
• Notice: Undefined property: stdClass::$discount_percent in include() (line 125 of /var/www/clients/client0/web97/web/sites/all/themes/marcapelli/templates/node--product.tpl.php).