differentiate between gross profit and net profit 3. The role of securities investment Managing a business's operations, marketing and purchases activities and expense management are just some from the decisions that management needs to deal with. After they have designed a assist the company will then must decide what to do with those profits. Among the choices for using income is: operations, returning cash to shareholders, or keeping profit reserve for future use. In this article we discuss how you can calculate expanding the figure that's reported as retained earnings on balance sheets and presenting a review of why a company would want to keep a reserve. The determination of this ratio mainly depends on the supply and demand relationship between the two sides and the competition. In general, the interest rate falls when the supply exceeds demand. Interest rates rise when demand exceeds supply. In addition, law, habit and so on also have a larger role. Marx's theory is of guiding significance to explain the question of interest rate decision under socialized production. He said he believes "this is really a long-term trend in pushing for continued use of memory and storage."