Ok so we have a situation where we sell bottles of drinks. Here in Finland bottle pawns have different VAT than the contents. So what I need to accomplish is one price shown to customer when he or she views the product but when the product is put in to the cart and/or displayed at the checkout the price should be displayed in two with both parts divided in to VAT and the standard part.

For example:
product display: 24 bottles cost 50€
in cart: 24 bottles cost 50€
in checkout 24 bottles, contents 34€ inc. VAT and pawn 16€ inc. VAT

How would you do this kind of thing? Thanks!