Customized shopping cart

Small travel agency specializing in, booking Group Travel, needs ASP,net SQL developer to modifiy an existing Event Calender (or create a new stand alone) script that will enable use to track payments online to group travel bookings: Needs 3 user levels: Attendee, Group Leader and Admin. * attendee able to register for events online. * attendee can login, retrieve passwords * View his or her account balance and payment histories * attendee can make partial payments to bookings * Receive an email after payments are posted manually. Group Leader: * View reservations of attendees in his or her groups * Login * Recover Password * Register * View Details * View Payment History * Check account Balances * Receive email confirmation after payments are manually posted. Admin Leader Login * Create/Modify user and group leader accounts. * Create New Group Events * Create User * Post Payments to Attendees account. * Ability to Check * Invoices Additional services will be required later.