vat number3 b2b2 woocommerce2 b2b/b2c hybrid1 block checkout1 business to business1 catalog mode1 checkout1 classic checkout1 conditional logic1 custom fields1 delivery notes1 discount rules1 ecommerce1 fatturazione elettronica1 fee rules1 field builder1 gift wrap1 hide prices1 hide products1 invoice1 minimum quantity1 moderate registration1 number1 offers1 order meta1 pec1 pricelists1 prices by quantity1 quotations1