input: Write a function to calculate the total sum of all elements of a given list. If the list is empty, return 0.
  assert calculate_sum_of_list([1, 2, 3, 4]) == 10
  assert calculate_sum_of_list([-1, -2, -3, -4]) == -10
  assert calculate_sum_of_list([0]) == 0
  assert calculate_sum_of_list([]) == 0
output: def calculate_sum_of_list(lst):
      return sum(lst)