how to calculate profit margin in accounting "If there is no allow most of the European Union oriented financial services agreement, the financial sector accounts for about 7% of GDP, but about 10% of tax revenue and 14% of the exports, may be affected by the special Britain will stay there," the report said. The new Surface Pro(2017) accounts for 9.2%, roughly the total of the Surface Book(7.5%) and the Surface Laptop (2.0%). 6. The accounting benefit is bound by the prudent principle. According to the principle of prudence, when there are a variety of accounting methods to choose from an economic business of an enterprise, it should choose a method that neither overestimates nor depreciates the benefits. Enterprises manipulate profits to achieve homogenization of profits, most of which adopt the method of overestimating earnings, and the subjective selection of the period of value-added. The development of automobile modeling was better aerodynamic design combined with seating comfort to be properly, in full consideration to the above two key problems, on the basis of efforts to develop new technology in the field of human body engineering, in order to design and make cars more perfect, more outstanding for the target. One day, the car cab will form a "glass cover" with beautiful curves. It is reflected in the geometry of the body, the round and the streamline. At that time, the paint of car colour will reflect soft feeling and transparent feeling in the bright-coloured, so will be more pleasing to the eye. "We are concerned that if the UK decides to leave, it is likely to lead to a weaker pound, higher inflation, lower disposable income and less investment," she said. This year, ms lagarde said there was a marked slowdown in activity and the UK's recent performance was disappointing because of the best performance of the global economy since the financial crisis.