Computer Firm

num_models = int(input())
sales = 0.0
rating = 0
for i in range(0, num_models):
    model = int(input())
    model_rating = int(model % 10)
    model_sales = int(model / 10)
    if model_rating == 2:
        sales += 0
    elif model_rating == 3:
        sales += model_sales * 0.5
    elif model_rating == 4:
        sales += model_sales * 0.7
    elif model_rating == 5:
        sales += model_sales * 0.85
    elif model_rating == 6:
        sales += model_sales

    rating += model_rating

print(f'{sales:.2f}')
print(f'{(rating / num_models):.2f}')