On receiving the report of the returns of a referendum and election, the commissioner shall determine:
(1) the number of votes cast for and against the referendum proposition;
(2) the total volume of production of the commodity during the relevant production period in the area described in the petition;
(3) the percentage of the total volume of production of the commodity that was produced by those voting in favor of the referendum proposition; and
(4) the appropriate number of candidates receiving the highest number of votes for membership on the commodity producers board.