cost
(20) The term “cost”, unless the context indicates otherwise, means total costs (both operating and capital) incurred over the estimated remaining useful life of an electric powerplant, discounted to present value, as determined by the Secretary (in the case of powerplants, in consultation with the State regulatory authorities). In the case of an electric powerplant, such costs shall take into account any change required in the use of existing electric powerplants in the relevant dispatching system and other economic factors which are included in planning for the production, transmission, and distribution of electric power within such system.