Preheat oven to 350°F.  Spray 15x10-inch jelly roll pan with cooking spray.

Prepare popcorn according to package directions.  Remove all unpopped kernels.  Place popped corn in large bowl sprayed with cooking spray.

Spray sides only of medium saucepan; add sugar, Fleischmann’s, syrup and salt; bring to boil over medium-high heat.  Boil for 2 minutes stirring constantly with wooden spoon.  Remove from heat.  Pour over popcorn mixture, tossing gently to evenly coat.  Spread onto prepared pan.

Bake for 15 minutes, stirring every 5 minutes.  Remove from oven; stir again. Spread onto wax paper to cool thoroughly.  Store in tightly sealed container.