Each department shall make such reports of supplies on hand, or which may be needed, as the commissioner of administration may direct. All reports, bids, specifications and contracts, and all records of purchases and sales of any kind, made by the commissioner of administration shall be maintained by the commissioner of administration and shall be open to inspection by the public as prescribed in section 610.021. After having kept any papers or records referred to in this section for a period of five years the commissioner of administration may destroy or otherwise dispose of said records.