阅读短文,根据文章内容从下列各题的三个选项中选出一个最佳答案或判断句子正误: A Mary is going to the supermarket tonight. She has a shopping list from her mother: 2 pencils, 5 exercise books, 3 notebooks, 2 loaves of bread, 5 bottles of mineral water, and 2 kilogras of grapes. Some of these items are on sale. Item Price list (unit price) Original price( 原价) Present price( 现价) Pencil ¥ 2.2 ¥ 2.2 Exercise book ¥ 0.6 ¥ 0.5 Notebook ¥ 3.5 ¥ 3.5 Bread ¥ 4.8 ¥ 4 Mineral water ¥ 1.2 ¥ 1 Grape ¥ 3.7 ¥ 3.7 5. How much will be saved for Mary if she buys all the things on the list?