As of right now (6/26) the Cubs have a 4.5 game lead on the Cards in the NL Central.
I will put 100 sand for every 1/2 game difference in the standing at the end of the regular season. So as a Cubs fan you have a 900 sand head start.
Cubs finish ahead by 10 games, I owe you 2000 sand. Cards finish ahead by 11 games you owe me 2200 sand. Only the Cards and the Cubs matter and where they finished doesn't matter, just how many games back the Cubs will be at the end.
We'll settle up at the end of the regular season.
I'll take the bet from the first comer only.