A hardware store will run an advertising campaign using radio and newspaper. Every dollar spent on radio advertising will reach 70 people in the "Under $25,000" market, and 50 people in the "Over $25,000" market. Every dollar spent on newspaper advertising will reach 100 people in the "Under $25,000" market, and 20 people in the "Over $25,000" market. If the store wants to reach at least 379,000 people in the "Under $25,000" market and 400,000 people in the "Over $25,000" market, how much should it spend on each type of advertising to minimize the cost?

Minimum amount spent on advertising (in dollars):

Dollars spent on radio advertising:

Dollars spent on newspaper advertising: