Problem 8: A manufacturing operation produces four different refrigerator models, with different production requirements as given in the table below. If all four models can be produced using the same machines and no time is lost due to equipment changeovers, how many machines would be needed to produce 5000 of each model during the next year? Assume one year is equivalent to 2000 hours of operating time. Model B D Unit Production Time 8 hours 10 hours 12 hours 15 hours Production Target 5000 5000 5000 5000