In some EU countries, all discounts, including special prices, must be mentioned in invoice. But Magento doesn't display speciall price anywhere in orders. If speciall price is applied, it will display it just as regular price.
The below is an example of order. Actuall product price was 60€ and speciall price was applied. But it won't display this discount anywhere. Is there any simple solution to this problem? At least I would need it inside invoice.