There are multiple ways of deleting bom types, these are single delete, multiple delete, and deleting all.   To single delete tap the bin icon that is on the grey bar of the bom types card.     To delete multiple bill of materials tap the checkbox on each card’s grey bar, once selected the ones you want to delete, tap the delete icon next to the search bar.      A popup will appear asking if you are sure you want to delete the bom type, tap yes to continue or no to cancel this action.     Tapping select all will mark all of your bom types checkboxes, to delete all click the bin icon next to the search bar.   Once you have selected all, you will now have the option to unselect all in the same position as the select all button.