The maximum overdraft withdrawal is 2,000 yuan per day, which does not exceed 50% of the credit line. Then 2,300 yuan needs to be withdrawn in two days, such as 2,000 yuan per day and 300 yuan per day. Then the handling fee is 10+2= 12 yuan, and the daily interest is 1. 15 yuan. How much interest depends on how many days it takes from your withdrawal to repayment. In the case of calculating compound interest, the interest is 1. 15× days.