01. Sea Trip

# 01. Sea Trip

food =float(input())
souvenir = float(input())
hotel = float(input())


benzin = (420 / 100) * 7
benzin1 = benzin * 1.85

money1 = (3* food) + (3 * souvenir)
day1 = hotel * 0.9
day2 = hotel * 0.85
day3 = hotel * 0.8
all_money = benzin1 + money1 + day1 + day2 + day3

print(f"Money needed: {all_money:.2f}")