Hello, I'm Thang from Vietnam, Have 7 years experience in PHP, CSS, HTML, XML, AJAX, programming. And many platforms such as Oscommerce, Prestashop, Joomla, Wordpress, Ossclass, PhpFox, Opencart, Cs-cart, X-cart...
I'm very interested in working on your project. I have strong skill on PHP and i'm ready to work on project. With you description i ensure can make a calculator and apply to you website
Thank you and best regards.
Thang