input: from typing import List
  
  def sum_list(numbers: List[float]) -> float:
      """ Sum all numbers in the given list.
      >>> sum_list([1.0, 2.0, 3.0])
      6.0
      >>> sum_list([-1.0, -2.0, 3.0, 4.0, -5.0])
      -1.0
      """
output:     total = 0.0
      for num in numbers:
          total += num
      return total