Question: John buys 20 hours of music a month. The average length of a song is 3 minutes. He buys each song for $.50. How much does he pay for music a year? Think carefully first, then make a decision:
He buys 20 * 60 = 1200 minutes of music a month. So that is 1200 / 3 = 400 songs. That means he pays 400 * .5 = $200 a month. So it comes out to 200 * 12 = $2400 a year. So the answer is 2400.