can any one tell me if a electrical load is shedded,how much does it cost?

i mean how much money does the electrical utility consider for load shedding (for 1kilo watt) in USA?

Load shedding doesn't cost the utility company anything. It saves them money when it prevents a system wide brown- or blackout. Load shedding means that the customers participate in a program to shut down some electrical loads in their individual buildings. This might happen whenever the utility grid is in danger of having to produce more electricity than the combined capacity of all the available generating equipment on the system. If there are any costs involved, it might be the lost revenue to the utility from the sales of electricity above the generating capacity or the lost production if one of the customers has to shut down revenue producing equipment.