Armando has a credit card that uses the adjusted balance method. For the
first 10 days of one of his 30-day billing cycles, his balance was $2500. He
then made a payment of $1600, so his balance decreased to $900, and it
remained that amount for the next 10 days. Armando then made a purchase
for $1300, so his balance for the last 10 days of the billing cycle was $2200. If
his credit card's APR is 33%, how much was Armando charged in interest for
the billing cycle?
A. $59.67
B. $67.81
C. $24.41
D. $35.26