In the United States, the equivalent measures are called "self-sufficiency standards" or "living income standards". Unlike the federal poverty level (FPL), which is calculated from a single, national variable (cost of food), these models assume that different households have different needs, based on factors such as the number and age of children in the household, and the cost of housing in the particular area (usually a county) that they live in. In keeping with the principles of basic needs, these measurements do not include any extra money for entertainment, savings, debt payment, or unusual or avoidable expenses, such as vehicle repairs. It assumes that adults will be working and pay taxes; it also includes costs of all government, charitable, and family subsidies, such as free medical care through Medicaid, free food from the USDA food stamps program or a food bank, or free childcare from a grandparent. All of these costs are ignored by the official FPL measurement, but included in a self-sufficiency standard.