(b) The legislative auditor may collect, and the department, agency or board shall pay, any or all of the costs associated with conducting the post audits from the department, agency or board being audited, when necessary and desirable. The legislative auditor shall render to the department, agency or board liable for the costs a statement of the costs as soon after the costs were incurred as practicable, and it is the duty of the department, agency or board to pay promptly in the manner that other claims and accounts are paid. All money received by the legislative auditor from this source shall be expended only for the purpose of covering the costs associated with such services, unless otherwise directed by the Legislature.
(c) A copy of each report of audit when completed and certified shall be filed in the office of the department of finance and administration as a public record and a copy shall be filed with the attorney general for any action he or she may consider necessary.