price being fixed

Credit sale

Q: Mai ik electronics company mai as an internal auditor kaam krta hu mera sawal ap sy ye hy k jaha mai kaam krta hu yaha pr cash sale k sath sath installment pr bhi products sale ki jati hain. muhy ye puchna hy k installment ya lease pr products sale krna or esi jaga pr job krna shi hy ya haram hy?