Simple Shipping Calculator for ebay

I require a simple Shipping Calculator for ebay items on Australian ebay. My Shipping company provides access to a Calculator API <[login to view URL]> and returns **OUTPUT**: The API will output the fields below: | **error** | If any error occurs while processing your request, this field will contain an error message. Otherwise, 'OK' will be returned. | | **eta** | It's a string containing the Estimated Time of Arrival | | **price** | The price charged to deliver the goods. GST is already included. | I require? an? input box where the destination postcode is entered and the resulting shipping cost from the API is displayed. It would be nice if? the returned? shipping cost could be automatically added to the shipping costs in ebay checkout if that can be easilly? added. Please advise in your bid if this functionality is included. ## Deliverables Please note the requirement for each of the values returned from the shipping company API | **error** | ? -? display? ? "Postcode Unknown" | | **eta** | Do not display this information | | **price** | Price is to be displayed in the form? ? ? $[login to view URL] | Please indicate approximatly the time that you will take to complete this work