Firstly, we would need to head to the billing panel.
Click on the drop down of services and click on view available add-ons
After that, you should see something like this.
Choose the server to buy the dedicated ip for in the drop down. In my case, it is already selected.
We would then click the order now button. Then, you would be redirected to the checkout page to checkout.
This article is created by provsalt, a member of the WitherHosting community.