The cost was 3*5=$<<3*5=15>>15.

So he got 20-15=$<<20-15=5>>5 in change.

# Answer

5
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jack orders 3 sandwiches that cost $5 each.  He pays with a $20 bill.  How much does he get in change?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
5
Jack orders 3 sandwiches that cost $5 each.  He pays with a $20 bill.  How much does he get in change?
train