The sales manager for ABC Electronics wants to maximize his profit on the sale of two portable media player models, JVD-2000 and MDP-72. The wholesale costs of these models are $310 and $100 per unit respectively. The retail sales prices are $420 and $140 per unit respectively. The total wholesale cost of all media players purchased must be less than or equal to $200,000. To meet his quotas the sales manager must purchase a minimum of 100 units of each player from his wholesaler. Find the optimal number of the two different media player models purchased to maximize the total profit by using the graphical solution method. (You can use Excel Solver to confirm your answer but please submit your graphical solution.) Explain step by step