input: Write a function to calculate the total sum of all elements in a given list. The function should take a list as an input and return the sum of all its elements. If the input list is empty, it should return 0.
  assert calculate_sum_of_list([1, 2, 3, 4]) == 10
  assert calculate_sum_of_list([5, 10, 15, 20]) == 50
  assert calculate_sum_of_list([0, 0, 0, 0]) == 0
  assert calculate_sum_of_list([]) == 0
output: def calculate_sum_of_list(lst):
      return sum(lst) if lst else 0