The area company wants to add an area code composed of 2 letters to every phone no. In order to do so, the company chooses a special sign language containing 124 different signs. Company used only 122 of them and 2 were left unused. How many additional area codes can be created if company uses all 124 signs?
a)246
b)248
c)492
d)15,128
e)30,256
a)246
b)248
c)492
d)15,128
e)30,256
