food_delivery

chicken_menu_count = int(input())
fush_menu_count = int(input())
veg_menu_count = int(input())

chicken_price = chicken_menu_count * 10.35
fish_price = fush_menu_count * 12.4
veg_price = veg_menu_count * 8.15
all_menu = chicken_price + fish_price + veg_price
dessert = all_menu * 0.20
total_sum = all_menu + dessert + 2.5
print(total_sum)