i think it should seller setup, it not admin, let's say:
- seller sell car 50000$ and allow installment
- seller allow max loan amount 40000$ so user need to pay first (deposit) 10000$
- seller allow loan term (Loan maturity) min 2 years and max 10 years.
- INTEREST rate 1.5%
how seller need to show their installment ?
and other seller sell house and allow rate 1.3%, how user know their MONTHLY PAYMENT? INTEREST rate?