how to calculate net profit margin percentage Under the conditions of open economy, the scale of international capital flows is huge, which greatly exceeds international trade volume, indicating the great development of financial globalization. The impact of interest-rate differentials on exchange rate movements is more important than in the past. When a country tightening credit, interest rates will rise, character formed in the international market interest rate difference, will cause the short-term funds internationally mobile, capital generally always is flowing from countries with low interest rates to countries with high interest rates. The capitalist mode of production first developed from industry and gained dominance, then gradually expanded to agriculture. Because there are two kinds of monopoly in the agriculture, the monopoly capitalism and operation of land and land ownership of monopoly, so it does not have such as like the sort of free competition in the industry, thus hindering the average profit margin. Therefore, the excess profit in agriculture is converted into rent. First, the individual production price of land products is lower than the social production price. The second is absolute rent from the value of land products beyond the price of social production. Both rent entity, agricultural employment is part of the surplus value created by laborer, it embodies the land owners through agricultural capitalist production relations of common exploitation agricultural workers. On the surface, however, the rent is distorted as the value of the land itself, or the gift of nature, thus disguising the real class relationship completely. The income from the transfer of equity investment and the income tax treatment of losses The optimal combination of benefits and risks is the best combination of benefits and risks. If the benefit is certain, the risk is minimized; 4. Universality. The actual planning involves each manager and employee in the organization, an organization's overall goal is determined, managers at all levels in order to achieve the organizational goals, make the level of organizational work smoothly, all need to make a plan. Quality control indicators include: gasoline antiknock property (research octane number, motor octane number, antiknock index), sulfur content, vapor pressure, contents of olefins, aromatics, benzene content, corrosion, distillation range, etc. In January 2014, the national general motors (gm) IV standard was used. The state administration of quality supervision and inspection and the national standards commission issued the mandatory national standards for motor vehicles in phase V. The plan is to be implemented at the end of 2016. The sulfur content is the most critical environmental protection indicator in vehicle gasoline. In order to further reduce the emission of vehicle pollutants, the national V standard lowers the sulfur content limit from 50ppm in the fourth stage to 10ppm, which is 80% lower. Manganese has the potential risk to human health, and the vehicle emission control system will also have adverse effects. According to the principle of prevention, the limit value of the manganese content indicator is reduced from 8mg/L in the fourth stage to 2mg/L, which stipulates that no artificial addition is allowed. In order to further reduce the photochemical pollution caused by the evaporation of gasoline, and reduce the gas intake system of the automobile engine, the national five standard reduced the level of olefin from 28% to 24% in the fourth stage. Due to the decrease of octane number caused by the reduction of sulfur and manganese, the number of gasoline used in phase V was adjusted from 90, 93 and 97 to 89, 92 and 95 respectively. At the same time, considering the development trend of the automobile industry, the index requirements of motor gasoline are added in the standard appendices. The Resolution Foundation said the loss of pay across all sectors took the average loss for each of the UK’s 800,000 agency workers to £500 a year, up from £430 last year.