Add a new column to ItemPricing Sublist

The ItemPricing sublist is located the Financial subtab in Customer record. It contains the columns Item,Price level, Currency and Unit price by default. It is not possible to add a new column to this sublist through the standard NetSuite form/field customizations. Here is a sample code to add a custom column in UI which can act as a virtula field.

const beforeLoad = (scriptContext) => {
      
                var form=scriptContext.form;
                var sublist = form.getSublist({
                        id : 'itempricing'
                });
                 sublist.addField({
                               id: 'custpage_testfield',
                               type: serverWidget.FieldType.TEXT,
                               label: 'Test'
                       });  
}