If you fail to repay the loan after the due date, a late payment penalty of 5% will be added every month, which is compound interest every month

Assume that 5 years is 60 months

Late payment fee = ( Overdraft cash withdrawal + overdraft consumer payment)*(1+rate of late payment penalty)^60=(15150)*(1+5%)^60=300*18.679185894=5603.7557682 yuan

This algorithm has not yet calculated the monthly interest rate of the overdraft