During Checkout you will be taken to the Paypal Screen. You do not have to have a Paypal account to check out. Click on the link "Don't have a Paypal account?" when you reach the screen below. You do not have to sign up for Paypal either. This will bring you to the screen to add your credit card information. To zoom in on the screen please click on the image.
You will then be brought to the screen below. Just fill out your credit card information on the right and press "Review & Continue". Again, please click on the image to zoom.