OPERETTA TELLS STORY OF 'CINDERELLA': Shown above are 10 members of the cast for "Cinderella," in original operetta form, which was to be presented this afternoon by Slauson Junior High school students. A performance for parents and others will be given at 8 o'clock tonight at the school, and a third presentation will be held tomorrow morning for children from other schools. From left to right are Richard Webb, who has the role of the coachman; Ann Letsis, the fairy godmother, and Lois Jane Saffell, who portrays Cinderella, and a group of girls who have the part of fairies. Kneeling, left to right, are Victoria Hein and Dolores Dailey, and standing, Louise Cunningham, Helen Christoff, Doris Heinzmann, Erna Jaeger and Betty Hetchler.