You are a manager of a pharmaceutical firm that has a monopoly for a particular drug. Your staff has estimated the price elasticity of demand for the drug. When the price of the drug is​$1,500 per​ dose, the price elasticity of demand is 3.0, and when the price is ​$500 per​ dose, the price elasticity of demand is 2.0.
The marginal revenue of the drug when the price is ​$1,500 per dose is $______ (Round to two decimal places)
The marginal revenue of the drug when the price is $500 per dose is $______