(a) Suitable books and records concerning said sale shall be kept by the licensee for the duration of the licensed sale and one year thereafter and shall be open for inspection by the commissioner or his duly authorized representative.
(b) Upon the termination of a sale licensed hereunder the applicant shall within thirty days of such termination file a statement with the commissioner stating:
(1) The total retail value of the goods, wares or merchandise not disposed of during the sale, and