The hardware store will run the advertising campaign using radio and newspaper. Each dollar spent on radio advertising will reach sixty people in "Under $30,000" market, and 50 people in "Over $30,000" market. Every dollar spent on newspaper advertising will reach eighty people in "Under $30,000" market, and 30 people in the "Over $30,000" market. If store wishes to reach at least 570,000 people in "Under $30,000" market and 600,000 people in "Over $30,000" market, how much must it spend on every kind of advertising to minimize cost?