Mashelufu a sitolo ya supermarket ndi ntchito yokongoletsera njira zowonetsera luso lophatikizira katundu, kulimbikitsa katundu, kukulitsa malonda amtundu wa mawu. Ndi "nkhope" ndi "wogulitsa chete" zomwe zimasonyeza maonekedwe a katundu ndi makhalidwe a kasamalidwe ka sitolo, ndipo zimagwira ntchito yofunikira pakulankhulana pakati pa sitolo ndi ogula.
Tidzafotokozera momveka bwino ubwino ndi kuipa kwa chinthu chilichonse ndi ntchito zake kuchokera kuzinthu zitatu: mtengo, mphamvu yonyamula katundu, ndi maonekedwe.Zowonongeka zimaphatikizapo ndalama zatsopano zopangira mankhwala ndi mtengo wa mankhwala.