The cost of selling a product includes the cost of goods, packaging and transportation costs, handling fees, etc. Specifically, the cost of goods refers to the cost of purchasing the product, including production costs or import costs; packaging and transportation costs refer to the costs of packaging and shipping the product, including direct logistics costs and indirect labor costs, etc.; handling fees refer to the fees required to sell goods on the Amazon platform, including platform usage fees, transaction fees, etc. Of course, the cost of selling a product may also vary depending on different factors such as policies and regions.