Step 1: After build a form with full infomation of product and the end with a total price field ( a Hidden Field, Number Field or Calculated Fields) . You have to create a submit button. Then choose Woocommerce add to cart in Action after submit.
Step 2: Add product ID and Price Field Shortcode:
– You can add all field shortcode (infomation product) without Price Field Shortcode to Custom Order Item Meta.
NOTE: If you put this Form Shortcode to a Post / Page, you have to Edit Post / Page > Piotnetforms Shortcode in this Post/Page > Enter each of Piotnetforms Shortcode in this Post/Page, separated by pipe char (“|”)