Look at a costal de frijols sometime. Or Masa or arroz. Producto de EUA does not mean Estado Unica Autonima.
For that matter look at a can of Herdez duraznos, paquete de pecho de pavo, hot dogs, or even a jar of mayo. Nestle is not a Mexican company. Who do you think owns NIDO the dehydrated milk giant?
Mexico is not as isolated as it was 20 years ago. Merchants levante, grab their TelCel punch in the address of gobernacion and get the official SHCP tipo de cambio for the day. Merchants in giant mercados de abastos gossip and inside an hour everyone from giant vendors to the little indian lady selling onions on the floor off a handkerchief will know the value of the peso.
And SOMEONE runs off with all the proceeds of the now less valuable peso...
I will say this AGAIN and AGAIN and AGAIN...
Mexico is one of the few countries in the world with such a volatile currency. Now WHY do you think that is?