Supermarket

Facts: Mr. K goes to a supermarket and puts goods in his shopping cart. He queues at the checkout and places the goods on the conveyor belt. The employee of the supermarket’s operating company A pulls the goods over a scanner. Mr. K sees the price of EUR 50 and hands the employee a 50-euro coin. He puts the goods in his bag and takes them with him.

Question: Has a contract been concluded here? If so, what are the implications?