In this example you will need an Amazon 19.99% CC advertisement when processing payment for items in the cart.
Here is a great example issued by the Government of Canada.
!?...
As I have expected, you can NOT find an example of an INVOICE that has 2 currencies!
Dude welcome to my ignore list. lol
P.S when you get your cc statement foreign currency will show two currencys on it. Purchases and refunds.
P.S.S In this case if you use
BTC to pay down the USD amount on your invoice then bitpay acts as your credit card company.
Last edit...
The exchange rate fluctuates from day to day, and the exchange rate may be different on the date the refund was processed than on the original transaction date.