AJAX script automatic price update

Job ID: 32805810

Budget: €8 – €30 EUR

Hello, I am looking for someone who can make me a super simple AJAX script.

So here I have an input box with the field (mails) so I can enter an integer.

For example in this box I will put 1000 (in my script 1000 mails is worth 1.50€) so underneath I want to display 1.50€ then if in the box I put 2000 I want to display 3.00€ and that dynamically without needing to refresh the page.
Related categories: PHP JavaScript AJAX Node.js