When the buyer is paying cash, how and when is sales tax calculated when payment is made with a foreign currency?
Guessing it's the same as if the transaction had been paid in currency the tax is payable in, and the sales tax is calculated as if the foreign currency had been exchanged real-time to the the currency the tax is payable in, but really have no idea. Also, while I guess semi-related, if for some reason there's a profit realized during the currency exchange, must that also be taxed?