As I said, special offers & it was a while ago. But I checked just now & not much has changed, it seems: special offer 44 cent, normal price 69 cent.
I noticed long ago that Germany has surprisingly cheap food. Even compared to China, if you consider the low salaries there. Here in Greece pretty much everything is more expensive except for fresh fruits, vegetables & fish. Funny enough, even some Greek specialties (like bread sticks) cost more here than in Germany.