Hello Tomek,
What I need is to integrate your plugin in WCFM Multi Vendor Marketplace in order to Calculate at the Product Page the Shipping cost, taking Data from the Vendor Address (Postal Code set it in their User account) and the Client Postal Code (it will be asking to put it in a given field at this product page), also the Volumetric weight (length, height and depth plus weight), and a Table of costs from our courier (we will be building this table with the information that this Shipping company will provide to us by a pdf on monthly basis).
Do you thing that is possible? How?