Do you remember a time when you had to make a decision... but didn't know what to do? Imagine you're 7 years old and you're at the candy store with your father. You've got 10 cents, and there are two treats you'd like to buy. The trouble is, together, they cost 15 cents. As your father advised you, spending your money wisely would entail getting the most favorite treats you can afford. And you'd be satisfied with the purchase! Eventually, you decide...