Given the following information, how many machines should be assigned to an operator for lowest cost operations when: Loading and unloading time on one machine is 1.41 minutes. Walking time to the next facility is 0.08 minutes. Machine time is 4.34 minutes. Operator cost is $13.20 per hour. Machine cost is $ 18.00 per hour Given the following information, how many machines should be assigned to an operator for lowest cost operations when: Loading and unloading time on one machine is 1.41 minutes. Walking time to the next facility is 0.08 minutes. Machine time is 4.34 minutes. Operator cost is $13.20 per hour. Machine cost is $ 18.00 per hour