Orel's credit card has an apr of 12.15% and a grace period of 16 days, and orel pays his balance in full every month. if his last billing cycle ended on june 24, 2009, and he made his payment on july 13, 2009, did he owe any interest on his last statement's balance? a. yes, because he didn't pay within the grace period. b. no, because he didn't pay within the grace period. c. no, because he paid within the grace period. d. yes, because he paid within the grace period.