input: Write a function to calculate the total sum of all elements in the given list. The function should iterate through each element in the list and accumulate the sum.
  
  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([-1, -2, -3, -4]) == -10
  assert calculate_total_sum([]) == 0
  assert calculate_total_sum([100, 200, 300]) == 600
  assert calculate_total_sum([0, 0, 0, 0]) == 0
output: def calculate_total_sum(data):
      total = 0
      for element in data:
          total = total + element
      return total