input: Write a function to determine 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([5, 7, 9])==21
  assert calculate_sum_of_list([-1, -2, -3, -4])==-10
  assert calculate_sum_of_list([])==0
  assert calculate_sum_of_list([10])==10
output: def calculate_sum_of_list(lst):
      return sum(lst)