A quotation in not legally binding thought it contains some qualifying words which function as firm offer do.

报价并不具有法律约束力，尽管它也像实盘那样用某些字斟句酌的语言。

The quotation, which has been given by an audit firm we have been cooperating with, is 1000 only.

和我们一直有合作关系的一家审计事务所给我们的报价为1000元。

But I have also got another quotation from another firm.

不过我也收到另一间公司的估价单。