The MAKE YOUR MONEY BACK CHALLENGE is up right now somewhere in the town area. Look for the giant dollar bill.
Read the directions closely.
A serious chance to make some money here people, write the answers and or proof into teamspeak or a book. I suggest you keep a copy for yourself as well to prove you did it if you cant do all the challenges in one sitting.
Challenge 10 is free to do, you don't have to buy anything. You can read the first chapter of any book for free on a website that starts with a letter A.