input: Write a function to calculate the total sum of all elements in the given list.
  
  def calculate_total_sum(data):
      total = 0
      for element in data:
          total = total + element
      return total
  
  assert calculate_total_sum([1, 9, 3, 5])==18
  assert calculate_total_sum([0, 2, 4, 6])==12
  assert calculate_total_sum([-1, -2, -3, -4])==-10
  assert calculate_total_sum([5])==5
  assert calculate_total_sum([])==0
output: def calculate_total_sum(data):
      total = 0
      for element in data:
          total = total + element
      return total