The purchase clerk, receiving clerk and inventory control clerk shall give bond in a penalty equal to Seventy-five Thousand Dollars ($75,000.00) with sufficient surety, to be payable, conditioned and approved as provided by law. All assistant purchasing, receiving and inventory control clerks shall be bonded in a penalty not less than Fifty Thousand Dollars ($50,000.00). Such bond shall be in addition to any other bond required by law, with sufficient surety, to be payable, conditioned and approved as provided by law. The premiums of such bonds shall be paid from any funds available to the board of supervisors for the payment of such premiums.