A magnesium test checks the level of magnesium in the blood. Magnesium is an important electrolyte needed for proper muscle, nerve, and enzyme function. It also helps the body use energy and is needed to move other electrolytes (potassium and sodium) into and out of cells.
Floors in Pricing. A price floor is the lowest amount at which a good or service may be sold and still function within the traditional supply and demand model. Prices below the price floor do not result in an appropriate increase in demand.
Price Ceilings. A price ceiling is the opposite of a price floor: It's a government-mandated maximum price for a good or service. As economists Paul Krugman and Robin Wells note in their basic text Microeconomics, price ceilings are far less common than price floors in the modern U.S. economy. Still, there are some.hen government imposes a price floor, it's setting a minimum price for a good or service. Most businesses in the country have to contend with the most familiar price floor: the minimum wage. Government has said that there's a certain minimum price employers must pay for labor.