PHP Instant price calculator for printing website

Currently we have printing website under construction and we have instant printing price calculator for different printing products we sell online. We need someone who is expert and know how to integrate instant price calculator for all products. we do have shipping calculator from ups and fedex. we need anyone who knows how to make changes in current instant price calculator and know how to integrate that with database so that any discount offer we put on site get's applicable to instant price calculator he needs to add this thing in our admin panel so that when ever we want to make price changes we can do it from admin panel... OR we need expert who knows how to make instant price calculator in PHP and be able to integrate on our website that's in php. visit our website [login to view URL] and make one demo for anyone of the product and send me with all details about how i can operate from admin panel. Freelancer who has not done this short of work or don't have any sample project with same features should not waste there time.. u will have to send me your demo with front end and admin panel excess in order to make sure that you have prior knowledge to do such work. Do not bid without going through the website..