Human: Karen wanted to go out to get some fast food. She pulls up to the drive-through and orders a 5-dollar burger. Her son then yelled out that he wanted a 4-dollar sandwich, so it was added to the order. Karen then decided to order some drinks and opted for two 4-dollar smoothies. What is the total cost of Karen's fast-food order? Assistant:
Karen and her son order 5+4=9 dollars worth of food.
Karen decides to buy 4+4=8 dollars worth of smoothies.
The total for this order is 9+8=17 dollars.