Expensive living is yours for the taking if you're an ex-pat living in Tokyo, London and Moscow. Those three cities ranked as the most expensive in the world, according to the latest annual cost-of-living survey released Monday by Mercer Human Resource Consulting. The three least expensive cities were Asuncion, Paraguay; Montevideo, Uruguay; and Santo Domingo, Dominican Republic. [snip] The goods and services include the monthly rent for a two-bedroom luxury apartment unfurnished, the cost of a hamburger, the price of transportation and entertainment. For one month in that two-bedroom apartment in Tokyo, you'll drop a stunning $4,501. In Paris, you...