If you want to pay with a credit card, no problem. Here's how:

 

On checkout, you will see that at Step 2 you are asked for the payment method. Select PayPal. The secret is that you can pay PayPal with a credit card--no PayPal account is actually needed.

 Step 2

Then, when you are directed to PayPal, select Credit card from the lower right corner of the initial page:

 PayPal screen