orders

command = input()
products = {}
while not command == 'buy':
    split_command = command.split()
    product = split_command[0]
    price = float(split_command[1])
    quantity = int(split_command[2])
    if product not in products:
        products[product] = [price, quantity]
    else:
        if products[product][0] != price:
            products[product][0] = price
        products[product][1] += quantity
    command = input()

print('\n'.join(f'{key} -> {value[0] * value[1]:.2f}' for key, value in products.items()))