The cost included in the quotation of the product is the price of the product + product testing + product packaging + after-sales service. In addition to providing high-quality products, we also provide strict testing services, exquisite packaging, and life-long after-sales service. Our company is very focused on this aspect of quality control. We have a dedicated QC team to inspect the products for you. We also have a return warehouse in Hong Kong. If you encounter any quality problems, you can return it and we will return it to you. This is not every supply. Businesses can do it. If you insist on a very low-priced product, we can also provide it, but I will deal with testing and after-sales just like other suppliers. Do you still think our price is expensive?