Shirye-shiryen da aka tsara na farko don gada ya kasance don amfani da simintin don rage farashin.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Tsarin farko na gada shine amfani da kankare don rage farashin, amma an zaɓi zane na karfe bayan da aka ba da kyauta don gada mai tsayi sosai. "