need help in oscmax

i have website in newer version of osmax version 2.5 beta i am trying to install module point and rewards i have install full but i am having one problem it is not cutting price on confirmation product page, i think this is easy task for expert and i am not paying full 30 usd for this i can pay 5-10 usd for this and i will keep u in touch if i will get new problem then i will select you to solve that problem, rest of detail in pm