Give the step-by-step reasoning process and then the final answer. Ali's class wants to order 35 English textbooks and 35 geography textbooks. Knowing that a geography book costs $10.50 and that an English book costs $7.50, what is the amount of this order?
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The cost of the geography books is 35 * 10.5 = $367.5. The cost of the English books is 35 * 7.5 = $262.5. The total amount of the order is 367.5 + 262.5 = $630.
The final answer: 630.
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