input: 
  def calculate_total_cost(items: List[dict], shipping_cost: float, tax_rate: float) -> float:
      """Calculate the total cost of a shopping cart considering item prices, quantity, shipping cost, and taxes.
      >>> calculate_total_cost([{"name": "widget", "price": 10, "quantity": 5}, {"name": "thingy", "price": 7, "quantity": 3}, {"name": "doodad", "price": 5, "quantity": 2}], 7.50, 0.095)
      98.50
      """
      total_cost = sum(item['price'] * item['quantity'] for item in items)
      total_cost += total_cost * tax_rate
      total_cost += shipping_cost
      return round(total_cost, 2)
  
output:     total_cost = sum(item['price'] * item['quantity'] for item in items)
      total_cost += total_cost * tax_rate
      total_cost += shipping_cost
      return round(total_cost, 2)