Unas preguntitas

I suspect the prices are shown in USD because the primary market is for the U.S. tourist. It's called target marketing. And, yes, it would be a simple matter to state the price in MXP with a link to a current exchange rate for the USD--and the CN$ and the Euro and the --oh, whatever.

Then we could all start complaining that distances should be based on the meter, weights on the kg, etc., etc., etc., ad naseum.

Or we could focus on real issues like parking on the sidewalk or the wrong side of the street or walking down a public forum with an open container, or light up that cig in a restaurant, or let dogs run loose on a beach or bark all night or---or---or