Mark needs to buy 5 pizzas for a party. He knows that a large pizza cost $8.00 from both Pizza Palace and from Jack's Pizza, but he got some coupons in the mail. At Pizza Palace you get $10.00 when you buy 5 or more pizzas and at Jack's Pizza you get 30% off when you buy 5 or more pizzas. Which coupon gives Mark the better deal? Justify your answer.