Case 1:  the last (4th) digit is 0.
Choose the last digit 0.  That's 1 way.
Then choose the first digit any of {1,5,6,7,8,9).  That's 6 ways.
Then choose the second digit any of the 5 remaining ways.  That's 5 ways.
Then choose the third digit any of the 4 remaining ways.  That's 4 ways.
Total for case 1:  (1)(6)(5)(4) = 120

Case 2: the last (4th) digit is 6 or 8.
Choose the last digit either of {6,8}.  That's 2 ways.
Then choose the first digit any of the remaining 5 ways (can't choose 0).
That's 5 ways.
Then choose the second digit any of the 5 remaining ways. (can choose 0),  
That's 5 ways.
Then choose the third digit any of the 4 remaining ways.  That's 4 ways.
Total for case 2:  (2)(5)(5)(4) = 200

Grand total: 120+200 = 320 

Edwin