Sea Trip

food_price = float(input()) * 3
souvenir_price = float(input()) * 3
day_hotel_price = float(input())

hotelPrice = day_hotel_price * 0.90 + day_hotel_price * 0.85 + day_hotel_price * 0.80
transportPrice = 210.0 * 2 / 100 * 7 * 1.85

print(f'Money needed: {food_price + souvenir_price + hotelPrice + transportPrice:.2f}')