Answer
$60,840,000$
Work Step by Step
There are 10 different digits and 26 letters.
(1) A digit from 1 to 9 gives 9 different possibilities
(2) A letter: 26 possibilities
(3) A dot: one possibility
(4) A letter: 26 possibilities
(5) A four digit number: Each digit is one of the 10 digits, this gives $10^4$ possibilities.
Ovarall the number of different license plates is $9*26*1*26*10^4=60,840,000$
