他们将要购买的产品添加到在线购物车中。
They add the items to be purchased to the online shopping cart.
购物车中的商品条目都会提供一个链接以提供产品详细信息的页面。
Each item in the cart is usually a link that takes the user to the product details page.
对于每个货品，使用从购物车信息传递的数量和从数据库中的产品目录信息获取的价格，计算该货品的总价。
For each item, calculate the total cost for that item using the quantity passed from the shopping cart information and the price obtained from the product catalog information in the database.
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