input: from typing import List
  
  def runningTotal(arr: List[int]) -> List[int]:
      """Calculate the running total of the numbers in the given list.
      >>> runningTotal([1, 2, 3, 4, 5])
      [1, 3, 6, 10, 15]
      >>> runningTotal([10, -2, 3, 0, 7])
      [10, 8, 11, 11, 18]
      """
      import numpy as np
      return np.cumsum(arr).tolist()
output:     running_total = []
      current_sum = 0
      for num in arr:
          current_sum += num
          running_total.append(current_sum)
      return running_total