var  tv >= 10;
var  magazines >= 2;
var  radio >= 0, <= 120;

maximize audience: 1.8 * tv + magazines + .25 * radio;

subject to budget: 20000 * tv + 10000 * magazines + 2000 * radio <= 1000000;
subject to create: tv + 3 * magazines + (1/7) * radio <=100;