I've read some of the older posts regarding pesos vs dollars. I was originally thinking I should convert the majority of my money into pesos and also have some US dollars. But I've read that if the price of something is in US dollars, you should pay in US dollars. Is that true? Are most items shown in US dollars? Should I bring half and half? Also, are larger peso denomination (i.e 200, 500 or higher) accepted if your paying for something like dinner? Help, I am so confused!