15 - An operator is used for loading and unloading of parts to automated machines. Loading time is 1 minute; unloading time is 2 minutes, machining time is 30 minutes, Operator travel time between the machines including the inspection time is 4 minutes. Cost of operator is Cq=40 TL/Hour, cost of a machine is C2=200 TL/Hour. What is the cost per unit of production if optimum number of machines is assigned to the operator? (Note: Times are given in minutes and costs are per hour) a) 115.5 TL/unit b) 231 TL/unit c) 240 TL/unit 6930 TL/unit e) 132 TL/unit