computer_firm

number_of_computers = int(input())
sales_counter = 0
total_rating = 0
for computer in range(number_of_computers):
    number = int(input())
    rating = number % 10
    sales = number // 10
    if rating == 2:
        sales = 0
    elif rating == 3:
        sales /= 2
    elif rating == 4:
        sales -= sales * 0.3
    elif rating == 5:
        sales -= sales * 0.15
    sales_counter += sales
    total_rating += rating
print(f'{sales_counter:.2f}')
average = total_rating / number_of_computers
print(f"{average:.2f}")