听力原文：W: The warranty form. stated that as long as the product was registered within a week of purchasing it, it would be serviced free of charge for one year. M: But the purchase was made a little more than two years ago. How much extra charge for the service do I have to bear to fix this computer? W: We charge a standard fee of twenty dollars just to diagnose your computer. And you'll have to pay an extra fifteen to fifty dollars depending upon the problem. M: I can't believe it's that much! I was only expecting to pay about ten dollars. How long is the product repaired without being charged?