(a) An excise tax is hereby imposed on the storage, use, or other consumption in Escambia County of tangible personal property (not including materials and supplies bought for use in fulfilling a contract for the painting, repairing, or reconditioning of vessels, barges, ships, and other watercraft of more the 50 tons burden) purchased at retail for storage, use, or other consumption in Escambia County, except as provided in subsections (b), (c), and (d), at the rate of one percent of the sales price of such property.

(b) An excise tax is hereby imposed on the storage, use, or other consumption in Escambia County of any machines used in mining, quarrying, compounding, processing, and manufacturing of tangible personal property purchased at retail at the rate of one-half percent of the sales price of any such machine; provided, that the term machine as herein used, shall include machinery which is used for mining, quarrying, compounding, processing, or manufacturing tangible personal property, and the parts of such machines, attachments, and replacements therefor, which are made or manufactured for use on or in the operation of such machines and which are necessary to the operation of such machines and are customarily so used.

(c) An excise tax is hereby imposed on the storage, use, or other consumption in Escambia County of any automotive vehicle or truck trailer, semi-trailer, or house trailer purchased at retail for storage, use, or other consumption in Escambia County at the rate of one-half percent of the sales price of such automotive vehicle, truck trailer, semi-trailer, or house trailer. Where any used automotive vehicle, truck trailer, semi-trailer, 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.

(d) An excise tax is hereby levied and imposed on the storage, use, or other consumption in Escambia County of 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, which is purchased at retail for the storage, use, or other consumption in Escambia County at the rate of one-half percent of the sales price of such property; regardless of whether or not the retailer is engaged in the business in this county. The one-half percent rate 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.