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.
What is a 'Price Ceiling'. A price ceiling is the maximum price a seller is allowed to charge for a product or service. Price ceilings are usually set by law and limit the seller pricing system to ensure fair and reasonable business practices. Price ceilings are often set for essential expenses; for example, some areas have rent ceilings to protect renters from climbing rent prices.