Based on the principle of the elasticity of demand and the financial aim of profit maximization, this paper quantitatively analyses the sale price s adjustable direction, adjustable range and optimal adjustable units as well as the optimal sales in units in enterprise, gives the methods and steps of the elasticity of demand.

This paper analyses the relation about profit and goods price and advertisement cost,estiblishes the method about optimum tactics of sales by mathematics and software.

Under the volume of sales it is at random.

This paper ananlyses the enterprise earnings uncertainty in three differenct ways,and discovers that the main factors of influencing the enterprise earnings uncertainty are the volume of sales,the standard deviation coefficient of the sales volume,the period cost,the unit contribution margin and the bond interest.

This paper discusses, when the volume of sales is random variable, the contact among the wavy degrees of the volume of sales, the earnings before interest and tax, and the earnings after tax by utilizing the standard deviation coefficient.

Two-time fitting Verhulst direct model for loader sales prediction;

Study of gray system theory based construction machinery sales predicting model;

Study on Verhulst direct model for loader sales prediction

A new sales volume forecast model;

Algorithm to calculate maximum compensations ratio and minimum sales volume with definite risk coefficient;

The predication of an enterprise’s sales volume in a future time can directly affect its whole marketing strategy.