An advertising company uses radio and newspaper advertising. Every 1$ spent on radio advertising reaches 50 people in the youth market and 50 people in the adult market. Every 1$ spent on newspaper advertising reaches 60 people in the youth market and 40 people in the adult market. If the company want to reach at least 783000 people in the youth market and 800000 people in the adult market , how much should it spend on each type of advertising to minimize the cost.? This is a linera programming problem using the simplex method.