A Question concerning Belmont ROI

[cal828]

Here is my stab at it and no I'm not playing for real either and not my entry in this week's contest.

3,7,8//4,6,8,9//1,4,9//2,3,9//8//6,7,8,9,10=$108

3,7,8//4,6,7,9//2,4,9//2,3,9//8//5,6,7,10=$86.40