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How do I give Free Shipping on over $99 & state=Sydney?
Shipping Table Rates extension is nice solution for creating numerous shipping methods using flat and percent-based rates for shipping methods, specifying address, weight, price and quantity parameters for calculation of shipping prices.
And with Shipping Restrictions Extension you can set shipping restrictions based on country, state, product names, brands
order total, weight, address line, zip code, region, etc. (see the images attached)