Prices are shown in US$ or Pesos, please check which it is before paying. Almost everywhere US$ are accepted but you may get chance back in Pesos. Most major credit cards are accepted in tourist related businesses and in some stores even Euros are accepted. We do recommend however, that you bring US$ or if you must change Euros then always use the official banks, which are open from Monday to Friday from 9 a.m. to 4 p.m. There are also money change kiosks, check at each for the best rate before changing your Euros.