I told her about the Big Mac index, which The Economist magazine suggests is a way to compare the actual value of currencies.
She asked a good question: 'How much does one British Pound buy, anyway? How does it compare with the Australian dollar (currently worth about 41p, or 0.41 pounds)?' My sister-in-law is on her way to the UK. A BIg Mac in Japan costs 280 yen, or US$2.31.
