The purpose of the project - the calculation of the cost of the order "on the fly" directly on the site in the presence of the customer. The program keeps a database of customers, facilities, and all the windows have ever ordered. Also, the program includes a powerful built-in editor of prices. Add to calculate any of the windows, window sills, glasses, films, mosquito nets, works, and other things. When properly filling out application of prices will be a powerful tool in your hands!