F9izolPopPyubaby F9izolPopPyubaby 14-10-2016 Mathematics contestada Mr. and Mrs. Smith retired on 80 percent of their pre-retirement earnings. If they are living on $35,000 per year, What was the total amount of their pre-retirement income? A) 28,000 B) 43,750 C) 63,000 D) 78,750