Drupal Commerce expert needed

I have a default Drupal install with the following Modules installed: - Commerce - Views - Rules - Entity I have embedded a "commerce product type" into a content type and I want the shopping cart to update if it is selected. By default the "add-to-cart" button and functionality does not appear until after a piece of content is saved. I want the cost to appear during the "create content" stage. See attachment of a "test content" type. If the checkbox were to be selected/unselected, I'd like the shopping cart to update instantly. Drupal experts with experience using Drupal Commerce please apply. I don't want to create a "custom module" unless absolutely necessary. Please PM me if you think you can do this.