We have a tower with 10 floors. Each floor has a light source that can be turned on and off. A dragon has the task of turning the lights on and off according to the followir schedule: . Initially, all the lights in the tower are turned off Every day, the dragon starts his task at the lowest floor At each floor he visits, the dragon checks the light If the light is off, he turns it on and is done for the day If the light is on, he turns it off, and recursively continues his task at the next floor The dragon is paid one dollar for on-off operation. After 210 days, approximately how much was the dragon paid? O About $2,000 About $10,000 About $1,000 About $1,000,000