If we assume that the above figure is the maximum number of man-hours required to construct a single 500 MWe unit, then the cost of labor for a single 500 MWe unit would be about $3,000,000.
If we assume that the above figure is the maximum number of man-hours required to construct a single 750 MWe unit, then the cost of labor for a single 750 MWe unit would be about $3,500,000.