In determining a reasonable return, a rate (percentage) shall be employed that is representative of the cost of debt, preferred stock, and common equity capital. The rate base shall consist of the applicable net investment in utility plant (as defined in the FERC accounts), allowance for working capital, and such other items as may reasonably be included, less such investment as may, unless otherwise prevented by law, be attributed to other than investor capital.
(Ord. 2962, passed - -1986)