public class Main {
    public static void main(String[] args) {
        getPrice(34,4);
    }

    private static void getPrice(int cost,int hour){
        int price = 0;
        int hours = 0;
        if (cost>=8 && 7*hour<=60){
            for (int i=0;i<30;i++){
                if (hours>=40){
                    price+= (cost*1.5)*hour;
                }else
                    price+= cost*hour;
                hours += hour;
            }
        }

        System.out.println(price + " $");
    }
}