The board of supervisors may provide for the payment of the cost of vote tabulating equipment in such manner and by such method as it may deem for the best local interests and also may for that purpose issue bonds, certificates of indebtedness or other obligations which shall be a charge on the county or city. The bonds, certificates or other obligations may be issued with or without interest, payable at such time as the authorities may determine, but shall not be issued or sold at less than par. The board of supervisors may enter into lease agreements or lease purchase agreements for the use of vote tabulating equipment.