Hello,
How are you?
I just saw your post and i m applying for this job bcoz,
I can do this calculator in php and ajax that you can use in any website.
I have 7 years of exp in laravel, Mobile Jquery,WordPress,Joomla,Magento,Codeigniter, php,Ajax,HTML5,CSS3,mysql,PDO, JavaScript,Jquery, SQl,Bootstrap, All Browser and Mobile Responsive Design,Payment Gateways(Paypal,Credit),SMS and call apis.
Thanks
Shweta