Mable agreed to pay the tax and tips for dinner at a resturant with her four friends.Each of the friends paids an equal part of the cost of the dinner,which was $96.If the tax and tips together were 20% of the cost of the meal,Mabel paid how much less than any one of her friends?

Ken and Paul each ordered a sandwich at a restaurant. The price of Ken’s sandwich was x dollars, and the price of Paul’s sandwich was $1 more than the price of Ken’s sandwich. If Ken and Paul split the cost of the sandwiches evenly and each paid a 20% tip, which of the following expressions represents the amount, in dollars, each of them paid? (Assume there is no sales tax.)