There is hereby imposed on all sales of tangible personal property at retail and the furnishing of certain taxable services, as defined herein, a tax equal to four percent (4%) of the gross receipts of said sales. (Ord. 201 §6, 1976; Ord. 202 §4, 1976; Ord. 236 §§3, 5, 1983; Ord. 347 §1, 2008; Ord. 423 § 1, 2020)