input: Write a function to calculate the sum of a list of numbers using the built-in sum() function and meaningful variable names.
  assert calculate_sum([1, 2, 3, 4, 5]) == 15
  assert calculate_sum([10, 20, 30, 40]) == 100
  assert calculate_sum([0, -1, 1]) == 0
output: def calculate_sum(numbers):
      total_sum = sum(numbers)
      return total_sum