The handling fee for the overdraft of CCB's credit card is charged at .5% of the cash withdrawal amount, with the lowest in 2 yuan and the highest in 5 yuan. The handling fee is 2.5 yuan/pen. The interest will be collected in full from the day of each cash withdrawal. The interest rate of .5 ‰ per day will be compounded monthly, which will help you roughly calculate: 5*.5*3 days =7.5 yuan. Withdraw 5 yuan, one-month principal+expenses * * *: 5+2.5+7.5=51 yuan. Specifically, you need to be based on the amount of the bill given to you by CCB.