A tax is imposed on all persons engaged in the Village in the business of making sales of service at the rate of one percent (1%) 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 incident to a sale of service in accordance with section 8-11-5 of the Illinois Municipal Code. (Ord. 69-9, 11-24-69)