Robbing customer

I bought 2 chickens at Checkers Hyper Somerset Mall today. The weight on the packing is far out. 1 is more or less correct but the other is out by 400g. You are robbing the consumers by not weighing your products correctly. Looks like it was done intentionally. How can you weigh a product and put a different sticker on.

We always buy our groceries here, but will think twice from now on.