The board of county commissioners in each county of this state shall take, or cause to be taken, an inventory of all working tools, apparatus, machinery and equipment belonging to the county or leased or otherwise let to it or to any department thereof, other than that which is affixed to and made a part of lands and buildings, the cost of which as to each complete working unit thereof is more than Five Hundred Dollars ($500.00), and thereafter maintain or cause to be maintained a continuous inventory record thereof and of like tools, apparatus, machinery and equipment purchased, leased or otherwise coming into the custody of the county or of any office, board, department, commission or any or either thereof, and the disposition thereof whether sold, exchanged, leased or let where authorized by statute, junked, strayed or stolen, and annually thereafter, or oftener in event of death, resignation or removal of an elective officer with a term, to verify or cause to be verified by count and report of the same as of the end of a term of office and as part and parcel of the accounting required by law of a retiring or re-elected officer, and, as to appointive heads of departments amenable directly to the board of county commissioners and as to quasi-governmental boards and commissions such as free fair boards, hospital boards and the like, the same shall be as of the last business day immediately preceding the day certain commencing a new term of the board of county commissioners; all in the manner as provided by law.