Triple Berry Jam

I've been needing to make jam for over a month and I finally did it today. Here is the recipe I use. It is from my sister, Katie. I don't process it, I just put it in containers and put it in the freezer. I love this because I can make it any time of year. I use 9 cups of this fruit (from Costco) instead of what the recipe calls for:

Triple Berry Jam

4 cups frozen blueberries

2 1/2 cup frozen raspberries

2 1/2 cup frozen strawberries

1/4 cup lemon juice

2 pkg. pectin

8 cups sugar

Combine berries and lemon juice. Crush slightly. Stir in pectin. Bring to a full rolling boil over high heat, stirring constantly. Stir in sugar and return to boil. Boil 1 minute stirring constantly. Remove from heat. Skim off any foam (I skip this part). Process 5 minutes. Yield 6 pints.