Two operators are assigned to service four machines that have an expected downtime of 30 percent. When running, each machine can produce 40 units/hour. The operator is paid $20.00/hour, and a machine costs $30.00/hour to run How much is total expected cost (TEC) per piece for two operators? A $1.89 B 50.59 C $1.02 $0.69 E $110