human
Jay bought a book for $25, a pen for $4, and a ruler for $1. He paid with a fifty-dollar bill. How much change, in dollars, did Jay get?
assistant
How much money did Jay spend? ** Jay spent 25+4+1=<<25+4+1=30>>30 dollars.
How much change, in dollars, did Jay get? ** He received 50-30=<<50-30=20>>20 dollars in change.
#### 20