input: Write a function to calculate the running total of numbers in a given list using numpy. The function should return an array with the cumulative sum of the elements in the input list.
  assert runningTotal([1, 2, 3, 4])==[1, 3, 6, 10]
  assert runningTotal([5, 6, 7, 8])==[5, 11, 18, 26]
  assert runningTotal([10, 20, 30])==[10, 30, 60]
  assert runningTotal([-1, -2, -3])==[-1, -3, -6]
  assert runningTotal([])==[]
output: import numpy as np
  
  def runningTotal(lst):
      return np.cumsum(lst).tolist()