It is often a good idea to set a default quantity if that value is fairly common. For example, if a certain type of service usually takes 8 hours of labor, then you can set the default quantity to ‘8’, and the price unit to ‘hour’.
Setting a default quantity can be done by editing the Product/Service in the Catalog. Navigate to the My Company Sitemap -> Catalog -> View Catalog. You will need to click on the blue ‘Edit’ button for each Product/Service you would like to add these default quantities. Once you are on the Edit Page, you must enable ‘Show More’ Mode to see the quantity field. You may do so by clicking the ‘Show More’ button to ‘On’.