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( 4 ) A company is considering the purchase of some additional machinery as part of a capital expansion program. Four types of machines are being considered. The following table indicates relevant attributes of the four machines. Machine A B D Cost $50,000 $35,000 $60,000 $80,000 200 150 250 280 Square footage required Daily output, units 10,000 8,000 25,000 18,000 The total budget for this program is $750,000. The maximum available floor space is 16,000 square feet. The company wants to maximize the output (total number of units produced) resulting from the purchase of the new machines. Define your decision variable carefully and formulate the LP model for this problem. he