Use of figures and letters in advertisement and other lists. In all advertisements for the sale of mobile homes for taxes, and in entries required to be made by the clerk of the court or other officer, letters, figures, or characters may be used to denote the year or the years for which the taxes were due and the amount of taxes, interest, and costs. The county collector may subsequently advertise and obtain judgment on mobile homes that have been omitted, or that have been erroneously advertised or described in the first advertisement.