Fannie has a credit card that using the average daily balance method. For the first 16 days of one of her billing Cycles, her balance was $1,050, and for the last 14 days of the billing cycle, her balance was $1,280. If a credit cards APR is 19%, which of these Expressions could be used to calculate the amount Fannie was charged in interest for the billing cycle?
A. (0.19/365 x 31)(16 x $1050+14 x $1280/31)
B. (0.19/365 x 30)(16 x $1050+14 x $1280/30)
C. (0.19/365 x 30)(14 x $1050+16 x $1280/30)
D. (0.19/365 x 31)(14 x $1050+16 x $1280/31)