Kukonzekera kwamtengo:
Mphotho yamalo ambiri imayikidwa pakati pa 20% ndi 25% kuti athe kusanja ndalama ndi chiwongola dzanja cha osewera. Mphotho yomwe ili yokwera kwambiri idzawonjezera ndalama ndikuchepetsa phindu lonse; Mphoto yotsika kwambiri ingapangitse osewera kutaya chidwi.
Mwachitsanzo, ngati mtengo wa mphatso ndi yuan imodzi ndipo mtengo wa khobidi lamasewera ndi 0.5 yuan iliyonse, kuti mtengo ukhalebe ndi 40%, ukhoza kuwerengeredwa pogwiritsa ntchito njira yakuti "mtengo wamphatso/(mtengo wandalama×nambala yandalama)=mtengo wake". Ndiko kuti, 1/(0.5×X)=40%, ndi X≈5 yathetsedwa, kutanthauza kuti pamafunika ndalama pafupifupi 5 kuti mupeze mphatso ya yuan imodzi.
Ubale pakati pa kuchuluka kwa ndalama zoyikapo ndi mphotho:
Chiwerengero cha ndalama zomwe zayikidwa chikugwirizana mwachindunji ndi mtengo wa mphotho. Mwachitsanzo, ngati mphothoyo yayikidwa ku 50%, mphatso yokhala ndi mtengo wa yuan 1, yomwe ili ndi mtengo wandalama wa 0.7 yuan, ikhoza kuwina mphothoyo ndikuyika pafupifupi 3 (ndiko kuti, 1÷0.7÷0.5≈2.86, mozungulira mpaka 3).
Malingaliro:
Ogwiritsa ntchito makina amphatso akuyenera kusintha kuchuluka kwa mphotho malinga ndi momwe zilili kuti akope osewera ndikusunga phindu.
Nthawi yomweyo, kulondola komanso kukhazikika kwa makina amphatso kuyenera kutsimikizidwa kuti zithandizire luso la wosewera mpira komanso magwiridwe antchito.
Mwachidule, "points-eating ratio" ndi gawo lovuta lomwe liyenera kukhazikitsidwa poganizira zinthu zingapo.
