profit maximizing equation Gasoline English called Gasoline (beauty)/Petrol (UK), appearance is transparent liquid, inflammable, distillation range of 30 ℃ to 220 ℃, main components in C5 ~ C12 fatty hydrocarbon and naphthene classes, and aromatic hydrocarbon, certain amount of Gasoline with high octane number (antiknock combustion performance), and by the discretion of octane number can be divided into no. 90, no. 93, no. 95, no. 97. Straight-run gasoline components which are obtained by oil refining gasoline, catalytic cracking gasoline, catalytic reforming gasoline components such as different after refined gasoline with high octane number components made by the harmonic, mainly used in automobile ignition internal combustion engine fuel. Including ambulances, fire engines, sanitation vehicles, TV and radio cars, airport operations, municipal construction projects, etc. How do firms choose their overhead cost assignment? How do firms choose optimal cash strategy determined by critical production activities that create and capture values? What is the nature and function of expense assignment? What are reasons for expense indicators or cost drivers? What are some policy implications of the Activity Based Costing in formulating effective cost assignment and spending budget strategies? Thus, surplus value is the intrinsic essence of profit, and profit is the phenomenon form of surplus value. Surplus value into profit, the profit and then into average profit, etc., hierarchy, the more the more escalated from abstract to concrete, it is close to the reality of capitalist society and the consciousness of the capital relationship between the parties; As a result, capital relations are becoming more and more mysterious as they leave their own source or base and get further and further away. Bourgeois economists for capitalism exploitation system, trying to deny the existence of the surplus value, no conflict between capital and employment, the product of the profit as capital itself, as the result of both production and circulation process. The so-called trinity formula of profit (interest), labor wage and land rent is the most explicit and typical defense argument of bourgeois vulgar economy. Marx's theory of profit is the transformation form of surplus value, profoundly reveals the essence and source of the profit, and profit further transformation of various concrete form again and they reflect the complexity of the capitalist production relations and class performance, thus for the proletariat and working people struggle against the bourgeoisie, and fight for the liberation of revolution provides the theory of sharp weapons. It goes without saying that the overall objective of foreign exchange investment is to achieve the greatest possible benefit of risk. As in any other venture capital, "earnings" is a function of the time required, which is not measured in terms of the monetary gain. A small profit in two or three days means that the deal is a success. On the other hand, this small interest will not be available for two or three months, even if it is a 100% profit, and it may not necessarily be cost-effective from the point of view of time. Interest rates have a very important impact on the exchange rate, which is the most important factor affecting the exchange rate. We know that the exchange rate is the relative price between the two countries' currencies. Like other commodity pricing mechanisms, it is determined by the supply and demand relationship in the foreign exchange market. Foreign exchange is a kind of financial asset, which people hold because it can bring the benefits of capital.