gross profit per unit According to this model, the interest rate decision depends on the supply of savings and investment needs, money supply, money demand, four factors, cause a change in the saving investment, money supply and demand factors will affect the level of interest rates. This theory is characterized by general equilibrium analysis. Historically, the concept of income has first appeared in economics. Adam Smith, in the wealth of nations, defined income as "the amount of consumption that is not eroded by capital", and saw it as an increase in wealth. Later, most economists inherited and developed this view. 1890, ai (Alfred Marshall Maarshell) in its "the principles of economics," the Adam Smith's "wealth increase" enterprise, introduced the concept of earnings, is proposed to distinguish the entity capital and value-added benefits of economic benefits. Frances O 'grady, chief secretary of the UK federation of industry and industry, said: "this suggests that brexit uncertainty has damaged the household budget. Work and living standards must be a priority in determining the best choice for brexit. The government should maintain a single market membership at the negotiating table. " Hybrid cars, which add an internal combustion engine to pure electric vehicles, aim to reduce the pollution of cars and improve the mileage of pure electric vehicles. Hybrid vehicles have serial and parallel structure. V6 motor Mark carney, governor of the bank of England, is ahead of the finance committee meeting The important thing to keep in mind when being sued by plastic card company or junk debt buyers is when they do not have proof that will otherwise prove how the debt is yours, they do not have a case. For junk debt buyers, you are in luck since these agencies don't have the required documents that might prove you possess the debt, like a signed contract between you and the original creditor, because they documents are never released with the original creditor. Car stylists dress up cars as human beings. For example: the eyes of the car - headlights; Mouth -- air intake; Lung - air filter; Blood vessels -- oil roads; A circuit of nerves; A heart engine; Stomach - tank; Feet -- tires; Muscle - mechanical part. Try to inject a cold machine into life, make it have extraordinary artistic charm, give a person with aesthetic feeling. Automobile body form in the development process mainly experienced horse model automobile, box car, beetle type automobile, boat type automobile, fish type automobile, wedge car.