Hi,
Thanks for the job post. There are two ways to create a user calculation based order form, either by using existing WP Plug-ins or by creating a custom solution from scratch. We are comfortable in using both process and it completely depends upon level of customization you want in the order form.
So we look forward to know about form fields, formula for calculation and other changes you are referring to. Please provide details.
We have an excellent team of designers and coders who are skilled in PHP, JavaScript, MySql, HTML5, CSS3, AJAX and open source platforms like WordPress, Joomla, BootStrap for creating fantastic web applications.
You can see from our profile we are widely experienced, certified and trustworthy company with over 10 years of professional experience. We have a near perfect project completion ratio and please check our past work reviews for references.
I look forward to hearing from you.
Regards