Is It Really Worth It To Put In An Entry?

Do you still get charged if you try to put in an entry and get the message that it didn't work? I know the answers to so many puzzles that people get wrong. I would like to win some of that money.

I just wondered if my chances of getting called back were slim and none.

I watch this show because in some strange way it is relaxing and escapist. At first I vowed I would never try to put in an entry but lately I have been tempted.