While the device of Problem 50 is operating, two other loads as follows are also operating:
a. a 4-kW heater, continuously,
b. a 3.6-kW heater, on for 12 hours per day.
Calculate the yearly cost of running all loads.
Reference: Problem 50:
An electric device with a cycle time of 1 hour operates at full power (400 W) for 15 minutes, at half power for 30 minutes, then cuts off for the remainder of the hour. The cycle repeats continuously. At $0.10/kWh, determine the yearly cost of operating this device.
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