"Travelling in Mexico is much cheaper now than it was ten years ago," says a friend. "ten years ago, a dollar bought 10 pesos; this year, a dollar buys 15 pesos." Is your friend right or wrong? Given that total inflation over this period was 25 percent in the United States and 100 percent in Mexico, has it become more or less expensive to travel in Mexico? Write your answer using a concrete example – such as an American hot dog versus a Mexican taco-that will convince your friend.