Only if you submit two copies of the same script (a double entry.) You receive $5 off for submitting two copies of the same script before June 1 (early deadline; $75/2 entries.) Get $5 off if you submit by July 11 (regular deadline; $85/2 entries.) And you also get 5 bucks off with a double submission by the final (late) entry deadline (7/31; $105/2 entries.)

Alas, there is no discount for submitting several different scripts, but you do better your chances of winning, of course.