Diego has his eye on a new couch for his apartment. The couch is on sale for 1/4 off the regular price. Diego has to pay a delivery charge of $79.98, and he keeps within his budget of $1100. Diego's friend Sal comes to Diego's apartment a couple weeks after the couch is delivered. Sal likes the couch so much that he buys one just like it. Sal does not have to pay for delivery since he has a truck. The couch is no longer on sale. Sal pays cash for the couch and hands the clerk at the store only bills, the least amount required to pay fully. What is the greatest amount of money Sal hands the clerk at the store?