I was at the checkout when I said to my self hey that's a bit expensive for that size steak (didn't check before, it just looked good)... so I asked the checkout lady to weigh it and it was 310gr with packaging vs the 510grs on the package.

So I said hey wait a minute... then she starts acting like I was being unreasonable and said the package weight is different than the real weight, and I said yeah it should be ~20grs less.

So she called over the manager... 20 minutes later they give it to me for 1/2 price.

How often do the get away with it? It wouldn't be such a big deal if the farkers didn't have a duopoly... they don't even have a policy for addressing wrong weights. If the marked price is different to the till price you get it free.