You are a freshman in college and are planning a trip to Europe when you graduate from college at the end of four years. You plan to save the following amounts annually, starting today: $640, $660, $660, and $800. If you can earn 7.80 percent annually, how much will you have at the end of four years? (Round answer to 2 decimal places, e.g. 15.25. Do not round factor values.)