computer_firm_enumerate

number_of_computers = int(input())
sales_counter = 0
total_rating = 0

for computer in range(number_of_computers):
    number = int(input())
    first_two = ''
    last_digit = 0
    for index, digit in enumerate(str(number)):
        if index < 2:
            first_two += digit
        else:
            last_digit = int(digit)
    sales = int(first_two)
    rating = last_digit
    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}")