The expenses incidental to any special examination of banks, bank holding companies, or their affiliates shall be borne by the bank or bank holding company so examined, and such bank or bank holding company shall, on the call of the superintendent, pay into the Treasury of Alabama, earmarked for the use of the Banking Department, within 10 days after said examination, an amount not exceeding the actual expenses of such examination, including per diem, travel expenses and the pro rata portion of the salaries of the state employees engaged in making such examination.