concept of profit in economics The basic economic unit of society in the primitive society of the clan, tribe, slave owners in the slave society, feudal society's family and the manual workshop, after the evolution of the form of this modern form in a capitalist society was born enterprise. The income or loss of equity investment in an enterprise refers to the balance of the income of the enterprise due to the withdrawal, transfer or liquidation of the equity investment. The income from the transfer of equity investment shall be incorporated into the taxable income of the enterprise and shall pay the enterprise income tax according to law. These goals are ambitious, but they also remind us to do one thing in the right way. Interest rates in different countries have different connotations. In China, interest rates typically refer to bank interest rates, further pointing to the pboc's benchmark deposit and lending rates. In the United States, mainly refers to the bond market interest rates, the fed adjustment of benchmark interest rate, also not have mandatory administrative benchmark interest rates, but through open market operations after determine its rate for overnight loans between Banks. The petrol is overfilled (3) monetary benefits -- increase the monetary value of assets. There are both measurable and unquantifiable benefits in these three different forms of income. Among them: mental income is too strong to measure, monetary gain is easy to measure because of the static concept of value change. Economists, therefore, focus only on actual earnings. 5. The sealing ring of the gasoline pump in the trunk or lower part of the seat is damaged. Generally speaking, the interest rate varies according to the term of measurement, indicating that the method has annual interest rate, monthly interest rate and daily interest rate.