Cynthia has a cell phone. Her plan charges a flat fee of $50 per month and also charges for each additional minute that she talks over 500 minutes. Her bill was $51.60 in February and she talked 516 minutes.
What is her cell phone company charging her for each minute that she talks over 500 minutes?
A. $1.00
B. $2.40
C. $0.10
D. $0.24