Suppose a small company manufactures two products, radios and CD players. Each radio results in a profit of $15, and each CD player provides a profit of $30. Due to
demand, the company must produce at least 5 and not more than 25 radios per day. The number of radios cannot exceed the number of CD players, and the number of
CD players cannot exceed 30. How many of each should the company manufacture to obtain maximum profit?