non profit tax returns Under the theoretical framework of the theory, the theory of commodity market equilibrium and the monetary market equilibrium of Keynesian theory are unified. Marx's theory of interest rate decisions from the perspective of the source and essence of interest, taking into account the institutional factors in the role of interest rate decisions of interest theory, its theoretical core is the interest rate is determined by the average profit margin. Marx believed that under capitalism, interest is a part of profit and a form of conversion of surplus value. Modern economy, the interest rate as the price of money, not only restricted by many factors in the economic and social, and changes in interest rates to have a great impact on the economy as a whole, as a result, modern economists are studying the interest rate decision problem, pay special attention to the relationship between the variables and the balance of the economy as a whole, the interest rate decision theory has experienced the classical interest rate theory, Keynes's interest theory, interest rate in loanable funds theory and is-lm analysis as well as the contemporary evolution of dynamic interest rate model, the development process. The city of bentugon salvis, in the southwestern state of Rio grande do, has a reputation as the "capital of Brazilian wine" and has a history of almost 150 years. Nearly 85 per cent of Brazil's wine is produced in more than 700 vineyards, which have a total area of less than 400 square kilometres. The wine is fresh and balanced with cabernet sauvignon, merlot and chardonnay. While many key factors need to be taken into account when making plans, the core issue always is when to exit the transactions that have been entered. This actually includes three exit plans. For one thing, there must be a plan to accept losses, and to pull out if the deal loses. Second, there must be a plan to accept a profit, and once the profit target is met, it will be satisfied. Third, there must be a plan that allows the trader to exit the transaction in the event that a significant change is not occurring for a considerable period of time. First of all, it costs transaction cost for the manufacturer to purchase intermediate products in the market. It includes the cost of seeking suitable suppliers, signing contracts and supervising contract execution. If the manufacturer can produce some intermediate products within the enterprise itself, it can eliminate or reduce some transaction costs, and can better guarantee the quality of the products. Second, if the manufacturers need is a special type of specialized equipment, the supplier does not generally willing to specialize in only a buyer of the product of the investment and production, because this kind of proprietary investment risk is bigger. Therefore, vendors that need this specialized device need to solve the problem of specialized devices within the enterprise. In the end, the manufacturers hire employees with specialized skills, such as specialized product design, cost management, and quality control, and establish long-term contractual relationships with them. This can be more beneficial than buying the corresponding services from other vendors, thereby eliminating or reducing the corresponding transaction costs.