Amazon Marketplace web services integration

Candidate needs to show experience with the Amazon Marketplace Web Services API. I need to develop a Amazon Integration object (.dll) that will take the connection parameters in the constructor and will implement functionallity that will allow me to call all the apis in the Amazon Marketplace Web Services. located at https://sellercentral.amazon.com/gp/help/help.html/ref=ag_200376880_cont_help?ie=UTF8&itemID=200376880&language=en_US I have a winforms application shell you will use as a test bed for each function in the [login to view URL] (you will create the [login to view URL]), and return the results to be displayed on the test application. Mandatory Requirements for the integration. Manage Orders with XML * Retrieve Order Details - Order Report * Acknowledge Receipt of Orders - Order Acknowledgement * Ship and Confirm Shipment (and get paid) - Order Fulfillment * Refund or Partially Cancel Orders - Order Adjustment or Partial Cancellation * Retrieve Payment Details - Settlement Report Given the requirements above, I need a C# 2008 solution with the following: 1) a .dll that will have functions to implement the Mandatory Requirements 2) I will supply a windows form application (Testbed) that will, for each requirement, take input from the user, make the call and display the result on the application. Please make sure there are not ambiguities or gray areas in these requirements. Next Steps: I need you to evaluate the requirements and give me an iron-clad bid and delivery date for this project.