John decides to fix a racecar.  It cost $20,000 to fix but he gets a 20% discount.  He wins his first race but only keeps 90% of the money.  The prize is $70,000.  How much money did he make from the car?
He gets a 20000*.2=$<<20000*.2=4000>>4000 discount
So he paid 20000-4000=$<<20000-4000=16000>>16000
He kept 70000*.9=$<<70000*.9=63000>>63000
So he made 63,000-16,000=$<<63000-16000=47000>>47,000
#### 47,000