1.) Suppose that you also want to buy a cake for the party. You go to the supermarket to buy a cake and see that all of the cakes they offer are square. The cheapest sheet of cake costs $15.60 and it serves 80 people. You can buy any fractional part of the cake and pay that fraction of $15.60. If you are asked to buy ¼ of a full pan, how much would you pay? How much would it cost you if the store charges 8% tax on top of the amount you paid for the cake?