Pie! (say in Cartman-like voice)

This was my first attempt and making pies and I am now in LOVE!!!!  Be careful though, these are a little sweet.

2 store-bought frozen pie crusts
2 graham cracker crusts
1 cup sugar
2 bags of frozen blueberries (thawed)
2 bags of frozen blackberries (thawed)
5 tablespoons flour

Preheat oven to 350 degrees.
Unfold pie crusts and cut into 1" strips.
Place blueberries and blackberries in strainer and rinse. Drain berries and add to large bowl
Add flour and toss to coat
Add sugar
Pour 1/2 of berries into each pie shell. Place strips on top of crust in criss-cross pattern to form a lattice. Bake for 45 - 60 minutes or until bubbly. Serve.

Stay hungry my friend.