帮忙将以下一句话翻译成英文，不要直接复制google或其他翻译软件结果。如果翻得好，我会另外加分，谢谢！

Question

如果您未能在2011年7月31日之前支付以下应付金额，订单总金额将自动调整为以标准价格计算的总金额。

Answer 1

If you don't pay below the amount before July 31th, 2011, the total amount of order will adjust to the total amount based on the standard automatically.
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Answer 2

If you cannot pay the following amounts before July 31th, 2011 ， the order amount will be automatically adjusted to a total amount of the standard prices.

Answer 3

If you failed to pay the due amount before July 31th, 2011, the total amount of this order will automaticly change to the amount calculated by standard price.

Answer 4

If you fail to pay the payable amount which is shown hereinafter before July 31th ,2011 , the total amount of order will be adjusted automatically to the amount which is based on the standard price.

Answer 5

If you can't pay the following amount before July 31, 2011 , the order form aggregate amount will control automatically by the standard price computation aggregate amount.

Answer 6

If you fail to July 31, 2011 to pay the following amounts due before the order total amount will be automatically adjusted to a total amount of the standard prices.