推销产品，求帮译成英文，万分感谢。

说实话，楼主的语言，有点硬啊。。。架势很强势。不过还是帮你翻译咯，祝你好运~
We offered the price for A product is very competitive, what's your comments then?
And for the products Z supplied, we can do with better price and quality.
Looking forward to our cooperation.

（建议不要用贬低竞争对手的方式提高自己咯，这样真的不怎么好，在客户那里也不一定受用）

学习了。。。

And for the products Z supplied, we can do with better price and quality. 这句就先不说了

多谢指教，不妥之处还请指正。