code: def run(mini_batch):
      print(f"run method start: {__file__}, run({mini_batch})")
      total_income = mini_batch["INCOME"].sum()
      print(f"total_income = {total_income}")
      mini_batch["total_income"] = total_income
  
      return mini_batch
  
label_desc: Use image node_id 2 for calling a global function with example usage: run(mini_batch) and returns: mini_batch