It is for an allowance optional claiming 25k race.
I'm mostly concerned with the S.. I know basically that the NW1$ means nonwinners of a certain money amount, but I would like to know the complete meaning and answer (even the X part) from someone who knows this easily.

I don't know what it means off hand, and your questions has been here for a while so I guess no other members know the answer, but if I remember correctly the answer is on the betting form.

I can only guess as well, S might be SHOW as in Win,Place,Show(order of winning)or needing to show the ticket as a non winner $1 denominations X number of tickets, or dollars?

sorry that's the best I can offer..