I need someone to create something 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. I want it to be able to work in my ebay listing or my customers can just click on a link which will take them to a page where they can calculate postage cost. They will have to enter the weight (which i will have listed in my ebay ad) or (I can set the weight of the item for each ad that I create) they enter their postcode and a postage cost will be displayed for them.
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
I will choose the provider that can best explain to me that they understand the job and can do it.