Alice wants to buy some paper towels. She has two options. She can either buy a package of four rolls or she can buy one roll now and buy another when she runs out. Which of these options is better? Give reasons for your answer.
buying 4 rolls. If she buys 4 rolls, whenever she used up one roll she already has 3 to replace it. If she buys one roll and then one later, when she uses up the one roll she will have to go buy more