But every day you make a purchase and the account balance fluctuates, and sometimes very strongly.
In order to calculate the amount you receive at the end of the month, take advantage of this application.
* Indicate your interest rate (the default is 10%)
* Enter the number of days and the amount that was on the bill for these days.
And you know what your average monthly balance in the account, and how much you will be charged interest.
For example, in your account within 10 days was equal to the sum of 10,000$
-You expose the slider to 10 and enter the amount of "10000"
Then you have filled up the map on the amount of 20,000$, and did not do the operation for another 10 days.
-You expose the slider to 10 and enter the amount of "30000"
And then, on the 20th day, you will pay for the purchase in the amount of 17,000$, and by the end of the month (10 more days) operation did not commit.
-You expose the slider to 10 and enter the amount of "13000"