I would like to know how Migros has calculated the Rivella promotion. A 6-pack of Rivella Blue costs CHF 8.40 without the promotion. An 8-pack of Rivella Blue costs CHF 8.70 with the promotion. In this promotion I get 2 bottles free, but pay CHF 0.30 more. What use is it to us if the promotion is advertised as 25%, but the basic price is already calculated incorrectly. If the packaging says 2 bottles free, then I expect the sales price to be the same as without the promotion.