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?
Let's be accurate as possible. Think before you answer.
250
He got 250 *.

8 = $200.

He gets a 600 *.

25 = $150 discount on the second system.

So it cost 600 - 150 = $450.

So he was 450 - 200 = $250 out of pocket.

.

So, the final answer is 250