Loan Calculator not working on desktop

Hi All

I’ve managed to create a simple loan calculator - Car Loans

I have it working fine on mobile but it won’t work on desktop. I’ve tried putting the script in the head and the body (separately) and each time l do that, both desktop and mobile don’t work.

Any ideas will be greatly appreciated :slight_smile:

Here is my site Read-Only: LINK
(how to share your site Read-Only link)