What is the amount due on the bill? Cash withdrawal or installment? What is the credit limit? Since the current bill has been paid, the available amount is the difference between the credit limit and the unpaid bill amount. What is the current consumption of the outstanding (that is, the next) bill? Judging from the difference of 73 before and after the available amount, the actual repayment is 100, and only 27 can be classified as interest. Where did you get more than 30? It seems that the current repayment on the bill is only 73%, so it is impossible to withdraw cash. How did the interest come from? It's incredible.