new_contents: groceries = ["banana", "orange", "apple"]
  
  stock = { "banana": 6,
      "apple": 0,
      "orange": 32,
      "pear": 15
  }
     
  prices = { "banana": 4,
      "apple": 2,
      "orange": 1.5,
      "pear": 3
  }
  
  # Write your code below!
  def compute_bill(food):
      total = 0
      for item in food:
          if stock[item] > 0:
              total = total + prices[item]
              stock[item] = stock[item] - 1
      return total
  
subject: Create groceries.py