how to calculate total profit Marx's interest rate determinism is based on the source and essence of interest. Marx reveals that interest is a portion of the surplus that the capitalist who lends capital is divided from the capitalist who borrows the capital, and the profit is the transformation form of the surplus value. It is worth mentioning that Surface Pro is by far the most popular with users of Surface equipment, Surface Pro 4 proportion is as high as 39.7%, Surface Pro 3 also is as high as 21.7%, while older equipment Surface Pro/Pro 2 still has 5.6% and 3.7% of the users. On the Surface Book, however, the average user accounts for just 0.4 per cent of the market, except for the 7.5 per cent share of the first generation, which may be due to a short listing. 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. The concept of accounting income is called accounting income. According to the traditional view, the accounting income refers to the difference between the realized income and the corresponding expenses. It has the following characteristics: In such a simple deal, the details and considerations of the plan have exceeded what many traders can do in real deals. Therefore, it is not difficult to understand why so many people lose money in the foreign exchange futures market. Yu 'ebao, the world's largest money fund, took only four years to achieve the equivalent of 10 years of development, with a maximum annual yield approaching 7%. But in its rapid development, there have also been a big wave of backwater, the most severe, from March 2015 to September 2016, the yield was down from 4.4 percent to about 2.4 percent.