Hello!
How are you? We have extensive experience with Wordpress - 7 years and we can develop a calculator and insert it to the revolution slider.
We work with various popular technologies - CMS Wordpress, Joomla, HTML, CSS, Javascript, Jquery, Bootstrap, Php, MySQL, Adobe Photoshop, Illustrator. Please, you can see our portfolio here https://www.freelancer.com/u/Webln .
We are ready to discuss everything via private chat.
With thanks,
WebIn team.