profit centric To do this, monetary and fiscal policymakers must work together, including letting the central bank liquidate its budget deficit in extreme circumstances. But central bank independence is an obstacle, not a help, in working with the financial sector. A CBI survey of 109 companies this month found that online sales of black Friday and cyber Monday were "unremarkable". Economist lynde hull explained that the benefits of capital in different periods of time would be interest. According to linde hull, interest in a specific period and the difference between the expected consumption is savings (during the period of the growth of capital), and returns the sum of consumption and savings are given period of time. Interest rate, in the form of expression, refers to the ratio of the amount of interest to the total amount of borrowed capital in a certain period of time.  the interest rate is the interest level per unit time of the unit currency, indicating the interest rate. Economists have been looking for a theory that can fully explain the structure and change of interest rates. Interest rates are usually controlled by the central bank of the country and administered by the federal reserve board in the United States. Today, interest rates are one of the important tools for macroeconomic regulation. Rolling planning laws is according to the principle of "almost fine far" a certain period of the plan, then according to the plan implementation and environmental changes and adjustments and changes to the plans for the future, and by backward, combine short-term and medium-term plans of a kind of planning method. The taboo of to not eat eggs with soya-bean milk is regarded as the popular about soya-bean milk. There are two reasons for the statement: you are the trypsin in soya-bean milk can inhibit protein digestion, to cut back nutrition value"; second is the eggs in the sticky protein and trypsin in soymilk is combined, to make material stop digested, and help reduce nutrition value ".