It's possible that the default shipping methods included in Magento are not enough for you. For instance, if you are selling products that differ in size and weight and you need different shipping costs based on that, Magento's standard shipping methods are not enough. Another possibility is that your shipping costs need to be set as per product separately and need to be added together per product in your order. You will either need customizations or third-party extensions that arrange your desired functionality. One module supplier that has great expertise in Magento shipping methods is WebshopApps. You can find them here at: http://www.webshopapps.com/. Modules by WebshopApps are of a good quality and are relatively easy to install. If you are not exactly sure about your needs for a certain module, it is advised to mail them before you purchase it. As per the desire mentioned above, to input shipping prices per product they offer a free extension...
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