How much were 200 sheets of letter paper last week? If a textbook was 15:00 dollars last week, how much is it today?

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问题 How much were 200 sheets of letter paper last week?
If a textbook was 15:00 dollars last week, how much is it today?

选项 A、10 . 50 dollars.
B、4 . 50 dollars.
C、10 . 00 dollars.

答案A

解析细节题。All Textbooks一行中只有一个数字：30% off，对应于This Week，即本周教材打七折。题目说上周1本教材15美元，那么本周的价钱就应当是15×(1-30%)=10.50美元，选[A]。

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