Mr. Specter design the layout for a factory. The roof of the factory has an elevation of 56.2 feet and the floor the lowest level has an elevation of -15.3 feet. A pulley is installed on an outer wall at an approximate elevation equal to 1/4 of the total height of the factory. The factory office floor is located 5.5 feet above the Poli what is the approximate elevation of the factory office floor?