From the entire list of quantity sets, if you wish to delete a particular set then click on the delete icon located at the left hand side of the quantity set you want to delete.
After you click on the given icon, an alert message comes to your screen that ask you “Delete this record” to make sure you really want to delete the quantity set or not.
Click on “OK” button to finally delete the quantity set from the list, and if you do not want to delete the set then click on “Cancel” Button.