Show & Sell can advertise its products on local radio and television ( TV ). The advertising budget is limited to $10,000 a month. Each minute of radio advertising costs $15 and each minute of TV commercials $300. Show & Sell like to advertise on radio at least twice as much as on TV. In the meantime , it is not practical to use more than 400 minutes of radio advertising a month. From past experience, advertising on TV is estimated to be 25 times as effective as on radio. Determine the optimum allocation of budget to radio and TV advertising?