Low-income workers and their families do not earn enough to live in even the least expensive metropolitan American communities, according to a new analysis of families’ living costs published Wednesday. The analysis, released by the left-leaning Economic Policy Institute, is an annual update of the think tank’s Family Budget Calculator that reflects new 2014 data. The Family Budget Calculator is a formula designed to determine the income “required for families to attain a secure yet modest standard of living” in 618 different communities across the country that the U.S. Census Bureau defines as metropolitan areas. The formula uses data collected by the government and some nonprofit groups to measure costs