Interest is calculated at the daily interest rate of 5/ 10000.
Interest = overdraft principal * overdraft interest rate * overdraft days = overdraft principal *5/ 10000*50= overdraft principal *2.5%.
Late payment fee = overdraft principal * 10%*5%= overdraft principal *0.5%.
Interest+overdue fine = overdraft principal *2.5%+ overdraft principal *0.5%= overdraft principal *3%=5000*3%= 150 yuan.