Credit cards must be repaid in full when they are due, otherwise they will have to pay interest. The interest calculation method is a bit complicated. Its daily interest rate is 0.05%, and if it is not repaid in the next month, , then the previous interest will continue to be calculated. This question is okay, but there are still people who owe 10,000 yuan and owe 180,000 yuan in 7 years.

The interest rate for credit cards includes the following parts:

First of all, although credit cards are claimed to be interest-free, if the card consumption exceeds the limit, for example, the 1,000 limit costs 1,010, these 10 yuan The money accrues interest, which is called "over-limit fee". The fee varies according to bank regulations, and is generally 5% of the over-limit fee. Therefore, if the excess of 10 yuan is exceeded, 5% of the 10 yuan will be charged, which is 0.5 yuan.

Secondly, for credit card charges that are not repaid on time, banks usually charge full penalty interest, which means that if the debt is 11,000 yuan, 10,000 yuan is repaid on the repayment date, and 1,000 yuan is outstanding. Then when the bank calculates interest, not only the 1,000 yuan will be charged interest at an interest rate of 0.0005 per day, but the 10,000 yuan paid off before will also be charged interest.

Let me give you an example:

It is known that the monthly bill date is the 5th and the final payment date is the 23rd. A consumed 10,000 on May 10, 1,000 on June 3, repaid 10,900 on June 23, and 100 on June 30. Question:

How much interest does A need to pay back? ?

The answer is as follows:

The consumption distance of 10,000 yuan is 43 days, so 10000*0.0005*43=215

The consumption distance of 1,000 yuan is still 43 days. The payment date is 20 days, so 1000*0.0005*20=10

The fee of 100 yuan was not paid off in time, and it was 7 days overdue, so 100*0.0005*7=0.35

So A The interest required to be repaid is 225.35 yuan.

Think about it, everyone, banks are not public welfare institutions. They issue credit cards to make money. Although they are advertised in a flashy way, the core is to make money from consumers, and the way to make money is to collect interest. So everyone must repay in time!