A tax is hereby imposed upon all persons engaged in this municipality in the business of making sales of service at the rate of one percent of the cost price of all tangible personal property transferred by said servicemen either in the form of tangible personal property or in the form of real estate as an incident to the sale of service in accordance with the provisions of Section 8-11-5 of the Illinois Municipal Code. (Ord. 1969-6 § 1, 1969)