Karim can buy single poster boards for 80 paisa each or a package of 12 poster boards for Taka 7.50. How much more (in Taka) would Karim have to pay for 3 dozen poster boards if he buys them individually than if he buys them in packages?
A
6.30
B
2.30
C
5.40
D
None of the above
Correct Answer: 6.30