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The purchase price of each used book at a certain mail-order bookstore is $$\frac{2}{15}$$ of the original list price of the book. For each used-book order of more than 5 books, the total purchase price of the order is reduced by $2.50 for each book in excess of 5 books. If the total purchase price of an order of 10 books is $23.10, what was the total of the original list prices of the 10 books?
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· 相关考点
2.4.1 百分比所属关系与倍数关系的描述
2.4.1 百分比所属关系与倍数关系的描述
以上解析由 考满分老师提供。
