4. As the manager of a retail electronics store, you guarantee that the store will not be undersold. If a customer finds another retailer selling the same equipment at a lower price within one month of his or her purchase, you will refund the difference. A customer has written to you and enclosed an ad from another store showing that it is selling a router for $26.50 less than he paid at your store. The advertised price at the other store was a one-week sale that began five weeks after the date of his purchase. He wants a $26.50 refund. Inventing any reasonable details, write an adjustment letter denying his request. You are willing, however, to offer him an 8-GB USB drive worth $9.95 if he would like to come pick it up.