(A) There shall be set aside and paid each month into the respective cash reserve funds of each of the utilities and the sanitary sewage works the surplus earnings of each utility and sanitary sewage works for the month.
(B) Surplus earnings are those cash earnings remaining after provision has been made to take care of current obligations including:
(1) Operating expenses;
(2) Depreciation or replacement fund;
(3) Bond and interest sinking fund;
(4) Retirement fund; or
(5) Any other priority fund requirements fixed by law or by ordinance.
(`90 Code, § 13.22.020) (Ord. 89-31, passed - -)