When we are making an inquiry,what elements should be usually include?

要写一篇将近三分钟的关于此话题的文章，我不知道该如何去写……谢谢了！

英文询价-Make an Inquiry Make an Inquiry
1. Our contacts in the computer industry speak highly of your new computer.
2. We would like to make an inquiry.
3. That’s fine.
4.Could you send us some information about your products?
5. Certainly, I’ll send some catalogs to you today.
6. I hope we can do business together.
7. We cabled an inquiry to you yesterday.
8. Mr. Wang gave me full particulars last month.
9. We can quote your for U.S. $1500 for the software.
10. In the cable you asked for a quotation.
11. I’ll need to check.12.? I think 20 days would be the earliest date possible.
13. We will send you inquiry by cable tomorrow.
14. They are afraid to hurt their company’s image.
15. We can give you a price of $20 for each unit.