Carla has a credit card that uses the average daily balance method. For the first 15 days of a 31-day billing cycle, her balance was $2560, but then she paid off her entire balance and didn't make any new purchases. If her credit card's APR is 28%, how much was Carla charged in interest for the billing cycle?

A.$29.46

B.$31.42

C.$60.88

D.$0

A. 29.46 They say i need 20 characters but idek how i got it tbh i just know i put it in and it was right

Ok so first ket me stay that she only needs to pay interest for 15 days. What you need to do is to find 28% of $2560. That's how much interest she'd owe if she had had the $2560 balance for one entire year. After that what you need to do is divide that amount by 365 to find the interest for one day. Then multiply that number by 15 to find the interest for 15 days. So it will be something like:

X = 28 / 100 * 2560. And that is how you solve this