old_contents: shopping_list = ["banana", "orange", "pear", "apple"]
  
  
  
new_contents: shopping_list = ["banana", "orange", "pear", "apple"]
  
  stock = {
  	"banana": 6,
  	"apple": 0,
  	"orange": 32,
  	"pear": 15,
  }
  
  prices = {
  	"banana": 4,
  	"apple": 2,
  	"orange": 1.5,
  	"pear": 3,
  }
  
  
  
subject: update to code