Why is it important that decision makers in a corporation know the cost function for producing the companies' products?

Decision makers should know a product's cost function if their decisions affect the amount of product produced. To know the cost impact of their decisions, decision makers apply the cost function to each possible volume of production. This is important in many decisions, such as pricing decisions, promotion and advertising decisions, sales staff deployment decisions, and many more decisions that affect the volume of product that the company produces.