Brainteaser iconBrainteaser - Maximizing Chocolate

Maximizing Chocolate
You have 15 dollars with you and decide to visit a local shop to buy some chocolates. The shopkeeper prices each chocolate at 1 dollar. He also offers a special deal: for every 3 wrappers you give back, you get 1 chocolate in return. How many maximum chocolates can you eat with your 15 dollars?