Mr. Berriman bought 8 packages of dry erase markers m and 4 whiteboard erasers w for $72. Mr. Williams bought 12 of the same packages of dry erase markers m and 2 of the same whiteboard erasers w for $98. Based on this information, what is the cost of one package of dry erase markers?
A. $2.50
B. $7.75
C. $7.25
D. $7.50