You take the Twix bar from the teacher, looking forward to eating the delicious chocolate inside. It feels heavier than normal. As you unwrap it, you are surprised to see a flash of gold inside. You rip open the wrapper, and a golden ticket falls out!
The ticket says:
"Congratulations! You, the lucky holder of this ticket, have won a trip to the International Space Station! The space shuttle will leave Florida on May 1, 2011."
Oh no! You don't have enough money for a flight to Florida. You need to earn $1000. How will you do this?