A state has a license plate that is 3 letters followed by 4 digits. I and O cannot be letters, and the number 0 cannot be in the first space for the digits.

A) How many different license plates are possible?

B) If there are 3,000,000 vehicles in this state, how many license plates are still avaible for use after the current vehicle is licensed? (Don't worry about personalized licenses, etc.)