The officers and employees of all departments, institutions, boards, commissions, and political subdivisions, subject to examination by the state auditor, shall afford all reasonable facilities for the investigation provided for in this title and shall make returns and exhibits to the auditor under oath in such form and in such manner as the auditor may prescribe. The auditor shall have full power and authority to audit any books, papers, accounts, bills, vouchers, and other documents or property of any and all departments, boards, commissions, political subdivisions, and financial institutions subject to the auditor’s audit. The auditor shall have authority to audit under oath any or all trustees, managers, officers, employees, or agents of any such departments, boards, commissions, or political subdivisions. When necessary, the auditor shall employ stenographers or clerical help, the expense incurred to be collected by the auditor from the respective department, institution, board, commission, or political subdivision.