Australia Post needs to be added as a integrated shipping option, so that the cost of shipping can be calculated automatically. This involves interfacing with Australia Post, who then do the calculation according to weight. Other shipping companies should also be added to allow automatic shipping calculations according to weight.
agreed - other ecommerce platforms have this functionality. The web doesn't revolve around just the US ;)
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https://developers.auspost.com.au/apis/pac/tutorial/domestic-parcel
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