As an intern at the U.S. patent office, you are asked to assess the validity of a power-generating device. The power-generating device supposedly operates steadily by receiving 256 kW via heat transfer at 4.5 C, receiving 370 kW via heat transfer at 115 C, and rejecting 200 kW via heat transfer at -180 C. The device generates electrical power in response to these various heat transfers. Assuming this device functions as described, determine its electrical power output, in kW