I need to add a quantity field on a service line item and I did attempt to adjust the line_items.js file in order to do this even went as far as to add a separate calculation function for service line items however this is just not a clean solution to this problem and it just ends up generating errors such as null values.
Does anyone have a clean way solution to do this rather then modifying code as the more code that gets modified means the less I can utilize official updates.