Jack is right. I went into the store to show them all the ads I had found on the internet (at $300) and they gave me no solution. It was a very frustrating and tough day, since I also wanted to file a complaint, and they claimed not to have the necessary number.
Mysteriously, I did receive a call the next Monday, offering to refund me the difference. I had no idea why the mangement had changed their minds. Jack, I wish you would have told me. I had no idea if you were working for me or against me. So, to you, I truly say "Thank you" for the refund. I did and do appreciate it. It made me feel there are some honest people out there.