Choose the first item.
Go to Pay Now.
This will take you to Paypal.
Don't worry about the currency. Agree to pay and complete as usual.
Paypal will do the conversion and charge your account.
Go to second item.
Repeat.
Wait for your items to arrive in the mail.
When you look at your Paypal account, you will see the payment recorded and the conversion fees listed.
(Hits Staples "That was easy" button. )