With the credit cards of two banks, how long can it last if robbing Peter to pay Paul?
No matter how many cards are used, robbing Peter to pay Paul is to pay twice the actual fee. If you owe 2, yuan, and the fee is .6%, you have to pay 2, X.6%X2=24 yuan every month, which is 12% 2,4 yuan a year, equivalent to .4% daily interest. Do not believe you can calculate.