My cousin Tiffany is about to spend a year in Argentina as an exchange student. On her blog, she metioned she was concerned about dealing with conversion of dollars to pesos and knowing what is and is not expensive.
She is right that eventually this will become easy for her to tell. But at first it is helpful to have a tool--right there in your wallet. I used a pocket convertor from travlang my first year in Taiwan. (Although their website is ladened with ads, I find this pocket convertor worth the clutter.)
Here is how to get to their pocket-sized convertor: after you choose the currencies you want to convert and it makes the conversion, on the second page underneath where it
shows you the conversion rates (and the pink java calculator) there is a link
to a pocket convertor.
Just for fun . . . 1 USD (US Dollar) is worth about 3 Argentinan Pesos or about 32.7 New Taiwan Dollars.