$new_attr{discount} = $discount_src->discount;
$new_attr{active_price_source} = $price_src;
$new_attr{active_discount_source} = $discount_src;
$new_attr{discount} = $discount_src->discount;
$new_attr{active_price_source} = $price_src;
$new_attr{active_discount_source} = $discount_src;