Required information The Bureau of Indian Affairs provides various services to American Indians and Alaska Natives. The Director of Indian Health Services is working with chief physicians at some of the 230 clinics nationwide to select the better of two medical X-rav svstem alternatives to be located at secondarv-level clinics. At 5% per year, select the more economical system. Solve using tabulated factors. The present worth of Del Medical is $ , and the present worth of Siemens is $ The more economical system is