the difference between net profit and gross profit Numerous systems are available which may provide ROI for electronic solutions, but it is crucial that you select a system that's most reliable and meets a company's requirements. The roi ought to be considerably in excess of the price necessary to solve problems in traditional manufacturing systems. The costs incurred on implementing a whole new system add the initial prices, maintenance upgrade fees, staff training costs, as well as the lack of productivity even though the new system is installed. Additionally, an extension cord may be required to further train staff if employees have a problem with the transition outside the paper system. The time and costs essential for implementing a new system should be balanced using the improvements to the productivity and streamlined processes which can be achieved through electronic manufacturing. In the late 19th and early 20th century, with the transition from free capitalism to monopoly capitalism, the factory itself had undergone complex and profound changes. Constantly adopt new technology to make the production rapid development; The scale of production keeps expanding, competition intensifies, and a large-scale monopoly enterprise is produced. The separation of rights and ownership and the formation of a professional management stratum; The scientific management system has been established, and a series of scientific management theories have been formed to make the enterprises mature and become modern enterprises. With the real success of the trump tax reform bill, investors in the short term focus more on whether the market has already digested this benefit. According to this model, the interest rate decision depends on the supply of savings and investment needs, money supply, money demand, four factors, cause a change in the saving investment, money supply and demand factors will affect the level of interest rates. This theory is characterized by general equilibrium analysis. "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. Understand different connotation of interest rates, will help us for the financial concepts of interest rates has a more deepen understanding, especially the formation, change and derivatives need to be determined by the market, this is a very key factor. Mooney and si prowse in its around the main accounting principles for enterprises ", not only emphasize to determine profits in a timely manner, and emphasizes the necessary through division operating earnings, the gains and the impact of price changes, to improve the comparability of financial statements and understandability.