(4) Upon every person, firm, or corporation engaged or continuing within Butler County in the business of selling at retail any automotive vehicle or truck trailer, semitrailer, or house trailer, an amount equal to one fifth percent of the gross proceeds of sale of the automotive vehicle or truck trailer, semitrailer, or house trailer, provided, however, where a person subject to the tax provided for in this subdivision withdraws from his or her stock in trade any automotive vehicle or truck trailer, semitrailer, or house trailer for use by him or her or by his or her employee or agent in the operation of such business, there shall be paid, in lieu of the tax levied herein, a fee of one dollar twenty-five cents ($1.25) per year or part thereof during which such automotive vehicle, truck trailer, semitrailer, or house trailer shall remain the property of such person. Each such year or part thereof shall begin with the day or anniversary date, as the case may be, or such withdrawal and shall run for the 12 succeeding months or part thereof during which such automotive vehicle, truck trailer, or house trailer shall remain the property of such person. Where any used automotive vehicle or truck trailer, semitrailer, or house trailer is taken in trade or in a series of trades, as a credit or part payment on the sale of a new or used vehicle, the tax levied herein shall be paid on the net difference, that is, the price of the new or used vehicle sold less the credit for the used vehicle taken in trade.
(5) Upon every person, firm, or corporation engaged or continuing within Butler County in the business of selling at retail any machine, machinery, or equipment which is used in planting, cultivating, and harvesting farm products, or used in connection with the production of agricultural produce or products, livestock, or poultry on farms, and the parts of such machines, machinery, or equipment, attachments, and replacements therefor which are made or manufactured for use on or in the operation of such machine, machinery, or equipment, and which are necessary to and customarily used in the operation of such machine, machinery or equipment, an amount equal to one fifth percent of the gross proceeds of the sale thereof. Provided, however, the one fifth percent rate herein prescribed with respect to parts, attachments, and replacements shall not apply to any automotive vehicle or trailer designed primarily for public highway use, except farm trailers used primarily in the production and harvesting of agricultural commodities. Where any used machine, machinery, or equipment which is used in planting, cultivating, and harvesting farm products, or used in connection with the production of agricultural produce or products, livestock, and poultry on farms is taken in trade or in a series of trades as a credit or part payment on a sale of a new or used machine, machinery, or equipment, the tax levied herein shall be paid on the net difference, that is, the price of the new or used machine, machinery, or equipment sold, less the credit for the used machine, machinery or equipment taken in trade.