(1) If the issuance of bonds is authorized at the election, or if any bonds outstanding against the district are being refunded, the district school board shall sell the bonds in the manner provided in s. 218.385. (2) In the marketing of the bonds, the district school board shall be entitled to have such assistance as can be rendered by the Division of Bond Finance, the Commissioner of Education, or any other public state officer or agency. In determining the highest and best bidder for bonds offered for sale, the net interest cost to the school board as shown in standard bond tables shall govern, provided that the determination of the district school board as to the highest and best bidder shall be final.