Within 10 days after the end of each month, the county auditor shall report to the superintendent of schools the amount of interest added to registered warrants and paid during the preceding month. The report shall show each district to whose registered warrants, paid during the month covered by the report, interest was added and the amount of the interest for the district. The superintendent of schools shall immediately report, in writing, to the clerk or secretary of each district for which interest was paid, the amount of the interest paid for the district.