John decides to trade in his stereo system.  His old system cost 250 dollars and he got 80% of the value for it.  He then buys a system that costs $600 that he gets a 25% discount on.  How much money came out of his pocket?
How much did John get for his old system? ** He got 250*.8=$<<250*.8=200>>200
How much did John get a discount on the second system? ** He gets a 600*.25=$<<600*.25=150>>150 discount on the second system
How much did John's second system cost? ** So it cost 600-150=$<<600-150=450>>450
How much money came out of his pocket? ** So he was 450-200=$<<450-200=250>>250 out of pocket
#### 250