Chandra pays an online service provider a fixed monthly fee plus an hourly charge for connect time. Her December bill was $12.48, but in January her bill was $17.54 because she used twice as much connect time as in December. What is the fixed monthly fee?
(A) $2.53 (B) $5.06 (C) $6.24 (D) $7.42 (E) $8.77
ANSWER: D