Roger bought a house for $100,000.  He was able to pay 20% down, and his parents paid off an additional 30% of the remaining balance.  How much money does Roger still owe on his house?
100000(.20)=20000$ down payment
100000-20000=$<<100000-20000=80000>>80000 remaining
80000(.30)=24000
80000-24000=<<80000-24000=56000>>56000$
#### 56000