Click on the "Buy Now" button below.
This will take you to a new Paypal Payment Gateway page.
On the left side, type in the "Description", add the "Item price" in USD and click on the Update link just below.
After the page is updated, go to the "Pay with my credit or debit card"option
on the right side and put in the card information.
Please make sure to complete all details in the "Billing information" section so that the correct Invoice can be raised and send to you.
After completing the details click on the yellow "Pay" button at the bottom of the screen.