Zovala za nsapato ndi zovala zotayidwa zomwe zimakwanira bwino pamitundu yosiyanasiyana ya nsapato ndi kukula kwake.
Amaletsa zinthu zomwe zingakhale zoopsa (kuphatikiza tinthu tating'onoting'ono ta organic ndi mankhwala) kuti zisakhudze pansi pa nsapato za munthu.