If the repayment is not made in full, and the cash is overdrawn before the due repayment date, the bank will charge interest at the daily rate of 0.5 ‰, and compound interest monthly. The interest-bearing date is from the transaction bookkeeping date to the repayment date, and the interest-bearing principal is calculated according to the actual amount owed. Compound interest is a way to calculate interest: add the previous interest and principal together to calculate the principal, and then calculate the interest. )

If Mr. Li's bill date is the 7th day of each month, the total payable amount of the monthly bill of 65438+10,000 yuan, and the bill details are10,000 yuan. Mr. Li repaid 8000 yuan on the due date. Because he didn't repay the loan in full, the calculation method of the interest amount deducted by the bank from the February bill is as follows:10000× 0.5 ‰× 22 (122 days from October 5th to October 27th) +2000× 0.5 ‰× 12.