The initial cost of the burger is 5 dollars
Adding the sandwich adds an additional 4 dollars
And ordering two smoothies adds 4 dollars each, so a total of 4 x 2 = 8 dollars
The total cost of Karen's order is 5 + 4 + 8 = 17 dollars
#### 17
The answer is: 17
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
What is the total cost of Karen's fast-food order if she initially ordered a 5-dollar burger, added a 4-dollar sandwich upon her son's request, and also ordered two 4-dollar smoothies for drinks?

### Answer:
