(a) The economies and efficiencies estimated to be achieved in acquiring, constructing and operating the proposed facilities for the generation and transmission of electric power and energy;
(b) The municipality’s estimated requirements for power and energy from the project and for reserve capacity and to meet obligations under pooling and reserve sharing agreements reasonably related to its needs for power and energy to which it is or may become a party; and
(c) The cost of existing or alternative power supply sources.