Formulate but do not solve the following exercite as a linear programming problem, National Business Machines manufactures x model A fax machines and y modelo fax machines. Each model Acost $120 to make and each model costs $160. The profits are s35 for each model A and $40 for each model fax machine. If the total number of fax machines demanded per month does not exceed 2700 and the company has earmarked not more than 5600,000/month for manufacturing costs, how many units of each model should National make each month to maximize its monthly profits Pin dollars? Maximize subject to the constraints manufacturing costs number produced x20 y20