6.15) A machine produces three products per 40-hour period. Setup times, processing times, and demands are shown below. If setup cost consists only of labor, and total labor cost is fixed, find the appropriate batch sizes to minimize inventory cost. All times are in hours. Item Internal Setup External Setup Unit Proc. Time Demand 1 1.0 1.5 0.1 2 1.5 1.0 0.1 80 3 2.0 2.0 0.2 60 100 6.15) A machine produces three products per 40-hour period. Setup times, processing times, and demands are shown below. If setup cost consists only of labor, and total labor cost is fixed, find the appropriate batch sizes to minimize inventory cost. All times are in hours. Item Internal Setup External Setup Unit Proc. Time Demand 1 1.0 1.5 0.1 2 1.5 1.0 0.1 80 3 2.0 2.0 0.2 60 100