John decides to replace all his VHS with DVDs. He can trade in his VHS for $2 each and then buy the DVDs for $10 each. If he has 100 movies, how much does it cost to replace his movies? Give me reasons, before answering the question
It cost 10 - 2 = $8 to replace each movie. So it would cost 8 * 100 = $800 to replace everything. So the final answer is 800.