[ARyan]

This is the ticket I came up with, although I will be knocking it down a bit still...

Race 3 : #1, #4, #6, #7
Race 4: #4, #5
Race 5: #1, #2, #4, #8
Race 6: #8, #10
Race 7: #1, #4
Race 8: #5

4 X 2 X 4 X 2 X 2 X 1 = 128 x 2 = $256.