I have visited your site and add a product into cart page. But i saw that shipping method is free. I think you did not set your shipping method. Please navigate to WooCommerce->Settings->Shipping and set your shipping method. Please check and let me know.
I am really sorry to say that you can not set per product shipping from the front-end. Only admin can set the shipping method for the seller from back-end. Seller can not add shipping per product from the front-end.