public double getPlayGroundPrise() {
        playGroundPrise = 0;
        while(pGroundList.size() > counter) {
            playGroundPrise = playGroundPrise + pGroundList.get(counter).getPrice()*pGroundList.get(counter).getCount();
            counter++;
        }
        counter = 0;
        return playGroundPrise;
    }