Shirley has a credit card that uses the previous balance method. The opening

balance of one of her 30-day billing cycles was $2830, but that was her

balance for only the first 2 days of the billing cycle, because she then paid off

her entire balance and didn't make any new purchases. If her credit card's

APR is 19%, which of these expressions could be used to calculate the

amount Shirley was charged in interest for the billing cycle?

. $0 +28. $2830

B

(0.19

(365

O A. (69• 30)80)

O B. 649.30 20$0 +28 • $2830

O c. (:30) (2•$2830

O D. (1930)82330)