This is the question in question: Free shipping in satchmo.
Why has it been closed? It IS programming (or at the very least library-usage) related.
closed as too localized by random Nov 19 '11 at 15:39
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Maybe "off topic" is wrong, but you did not show any effort of trying to do it yourself so people probably thought you're asking to get it on silver plate.
See this question for example, as you see the person there posted code and lots of details, most probably that's what is missing in your post.