一封英文商用書信,請幫幫忙翻譯,感激不盡~~

Subject : Inquire Letter
Dear Sirs,
As we are in need of 60 sets of Explosion Proof Motors in september,would you please offer us your best price as early as practicable?
The detail of enquiry are as follows.
Update: 還有這兩句的中文意思^^

It will be appreciated if you let us have your quotation at your earliest convenience.

We are pleased to make you an offering regarding our "Walker" shoes in the sizes you require.
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