4th: 3, 6, 9, 11
5th: 1, 2, 4
6th: 2, 7
7th: 1, 4, 6
8th: 4, 6, 7, 9
9th: 1, 4, 10
4 x 3 x 2 x 3 x 4 x 3 = 864 x $2. = $1728.
4th: 4, 12
5th: 8, 9, 10
6th: 2, 7
7th: 3
8th: 4, 6, 7, 9
9th: 1, 10
2 x 3 x 2 x 4 x 2 = 96 x $2. = $192.
$1728.
+$192.
= $1920.
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