=3. These generators are used in the following ways:

A generator may be started at 6:00 a.m. and run for either 8 hours or 16 hours, or it may be started at 2:00 p.m. and run for 8 hours (until 10:00 p.m.). All generators except the main generator are shut down at 10:00 p.m. Forecasts indicate the need for 3,200 megawatts more than provided by the main generator before 2:00 p.m., and this need goes up to 5,700 megawatts between 2:00 and 10:00 p.m. Generator 1 may provide up to 2,400 megawatts, generator 2 may provide up to 2,100 megawatts, and generator 3 may provide up to 3,300 megawatts. The cost per megawatt used per eight hour period is $8 for 1, $9 for 2, and $7 for 3.