The graph below shows the demand, marginal revenue, and cost curves for a monopoly. Price and Cost ($) 69 60 55 51 45 33 20 15 I MR 20 30 40 MC ATC Demand Quantity Demand, marginal revenue, and cost curves for a monopoly (text description ) Assume the monopolist produces at the profit-maximizing quantity and charges the profit-maximizing price. What is the amount of the monopolist's profit? Do not include the dollar sign ($) in your answer.