a category shares ECB President Mario draghi said at a press conference following the central bank's board meeting that important changes had taken place in the resumption of negotiations. In terms of the importance of the plan, the plan can be divided into strategic planning and operational planning. Of the companies surveyed, 37 percent said sales rose in December, while 17 percent said sales were down. The resulting balance is + 20% below the retailer's forecast of + 30%, and below + 26% in November. There were two opposing views of development in the 19th century. A push performance degradation is based on the second law of thermodynamics system, it argues that, due to the dissipation of energy, the world tends to be weak, the universe tends to "heat death", the structure of the retreat, disorder tend to the maximum, the whole world over time and the process of dying; Another is based on Darwin's theory of evolution of the evolution of the concept system, it points out that social evolution is the result of the increasing division of species, the evolution and increased, structure complex and orderly, and constantly reinforced by functional evolution, all nature and human society are to develop more advanced, more orderly organization structure. Activity-based costing (ABC) is an efficient management technique for assigning and governing the overhead costs. Overhead expense analysis and assignment can be produced more accurate through the use of ABC processes for a wide range of products, for product expenses and profitability analysis as well as for appropriate distribution and control over the overheads.