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? Let's answer step by step:
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. The answer: 17.