A two-liter bottle of Coke costs an average of $1.74 in Washington, $2.76 in Fairbanks, Alaska, and only $1.21 in Ardmore, Okla.
California's cities are making a comeback as the housing market there improves, Frutiger said. A resurgence in home prices, fueled by high demand and low inventory, is driving up the cost of living in metro areas such as Los Angeles and Orange County.
The index is calculated by measuring how much goods and services cost in six categories: housing, utilities, transportation, groceries, health care and miscellaneous items. The index doesn't account for inflation and uses the pretax value of goods and services, so actual figures may vary.