Calories to Consume Each Day To Lose Weight

We have a finished Flash/AIR application that we want to have turned into a facebook application. We have a short deadline since the application itself it built and running in Flash. We have a $300 budget set for this project as the Flash development has been completed -- we want to add it to our Inspired-Fitness-BootCamps accounts (if that's possible)? The application collects weight, goal (ie lose 1 pound per week, 2 pounds per week, etc) and other pertinent data and then allows input of how many minutes of different activities will be done for the week and then calculates how many calories you should eat each day to reach your weight loss goal.