If you have a 21.00% APR (Annual Percentage Rate) on a balance of $670.40 then you will be spending $0.39 per day, $11.57 per month, and $140.78 per year on interest.
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| Balance | $ | |
| APR (%) | ||
| Days in Month | ||
| Days in Year | ||
| Interest Per Day | $ | |
| Interest Per Month | $ | |
| Interest Per Year | $ |