I need someone to create a web page that can calculate a postage cost when someone enteres the weight and their postcode/zipcode based on the rates given to me by my freight company in Australia. It will be used by me in my ebay listings and my customers will just click on a link which will take them to a page where they can enter the weight (which i will have listed in my ebay ad) and their postcode and a postage cost will be displayed. Even better if the code can be placed in the ebay listing itself (if possible).
There are 39 different zones that have a diferent rate for each zone and there is multiple postcodes for each zone. There is also a base price. For example freight is base price of $20 + 15 cents per kg for zone Dar. Zone Dar is in postcode 7000 to 7100. So if something in zone dar weighs 10kg then the shipping cost is $20 + (10 x .15) which equals $21.50