marginal average profit function It can be seen that shares and shares are the relationship between form and content and cannot be confused. This was in October, when the recession caused sterling to fall. But he feels that the pound now reflects post-recession levels, and there is no reason for prices to fall further. He also estimated that the UK recession might end and that sterling could rise. His data have also shown that the price drop has stopped, and he sees it as a signal that price increases will begin. So he decided to buy the pound. In 1946, the famous British economist J.R. hicks, in value and capital, developed the concept of income into a general concept of economic gain. He argues that the real purpose of computing revenues is to make people aware of the amount of money they can spend without making them poorer. Accordingly, he gave a generally accepted definition of "the maximum amount of consumption that a person can spend at the end of the term, at the same level of prosperity". Hicks's definition, though primarily for personal gain, applies to businesses as well. In the case of the enterprise, according to this definition, the enterprise income can be understood as the maximum amount that can be allocated in the enterprise cost accounting period under the same amount of capital at the end of the term and the beginning of the period. Do foreign exchange business plan has a lot of principles and rules, but if it comes down to the simplest elements, it is nothing but make a entry and exit the starting point for any deal, at the end of the deal is profitable. Once the starting point is established, the change in the price level can be attributed to rising, falling or maintaining the original state. A trading plan must draw up a blueprint for action to enter the actual trading market. Once the price level has occurred to any of the three changes mentioned above, the trader can make the decision to buy or sell according to the plan. Interest rates are an important tool for regulating monetary policy, and they are also used to control economic growth, such as investment, inflation and unemployment. Reasonable interest rate plays an important role in the economic leverage of social credit and interest rate.