Why? There's going to be 6.2 million of them. Who's going to want to buy them? And more importantly, who's going to go through the trouble of keeping them and selling them for any kind of minor profit?
Consider the following factoids in the context of exchange rates and PPP. In other words, the ratio of foreign customers to domestic is probably far greater than foreign revenue to domestic revenue.
Factoids:
* Roughly 1.5 million Big Macs sold each day in the U.S. alone. https://expandedramblings.com/index.php/mcdonalds-statistics...
* U.S. accounts for less than half of global revenues. See https://www.statista.com/topics/1444/mcdonalds/ and https://www.statista.com/statistics/219453/revenue-of-the-mc...
* They serve over 60 million customers globally each day. http://www.thefiscaltimes.com/Articles/2012/04/30/13-Disturb...