This plugin is a shipping rate computation method that provides preconfigured shipping rates based on an order's subtotal -rates can also be set by the country, state / province, and zip code as in the "Shipping by Weight" plugin. For nopCommerce 2.60.
Source available at: http://nopshippingbytotal.codeplex.com/SourceControl/changeset/view/225225bb6b46
Download compiled plugin and 1.05 (2.50) to 1.07 (2.60) upgrade script at: http://nopshippingbytotal.codeplex.com/releases/view/90810