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, quantities, shipping cost, and applicable taxes.
      >>> items = [{"name": "widget", "price": 10, "quantity": 5}, {"name": "thingy", "price": 7, "quantity": 3}, {"name": "doodad", "price": 5, "quantity": 2}]
      >>> shipping_cost = 7.50
      >>> tax_rate = 0.095
      >>> calculate_total_cost(items, shipping_cost, tax_rate)
      105.925
      """
      total_cost = 0
      for item in items:
          total_cost += item['price'] * item['quantity']
      total_cost += total_cost * tax_rate
      total_cost += shipping_cost
      return total_cost
  
output:     total_cost = 0
      for item in items:
          total_cost += item['price'] * item['quantity']
      total_cost += total_cost * tax_rate
      total_cost += shipping_cost
      return total_cost