A: How is the product selling?

这产品卖得怎么样？

B: It’s selling well.

卖得很好啊！

A: What are the selling points of your product?

你们的卖点是什么呢？

B: Compared with competing products, ours is smaller and lighter.

比起其它竞争产品，我们的比较轻巧。