A monopolist desires to produce less goods while earning maximizing profit. However, if the marginal revenue of the goods are in decrease (less goods of demand), the monopolist must higher the demand by lowering the price for customers to buy the goods. Thus, the marginal revenue increases- goods demanded, lower prices of goods-for a lot of customer demands, produces more goods- due to customer increase of demand and lower price of goods. At the end of day, the monopolist makes maximizing profit..
