First, extend three initial offers that all include up-front payment.

首先，给予三个涉及预付款的报价。

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Unless otherwise agreed upon, initial offers shall be made free of charge.

除非另有约定，最初的报价应当免费提供。

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Unless otherwise agreed upon, initial offers shall be made free of charge.

除非另有约定，最初的报价应当免费提供。

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