Apologies

When I was in the shopping center I saw in a store a pair of shoes that I wanted to buy, I ask the priece to the seller and he told me that they cost 300,00 Bs F., I told him that I wanted to buy them, when I was going to pay He said, Please accept my apologies. I made a mistake with the priece, the cost is 200,00 Bs F. I respond That's OK, thank you very much.