Jason baked a berry pie. The recipe called for 9 ounces of blackberries, 10
ounces of raspberries, and 12 ounces of strawberries. In the supermarket,
he only found 12-ounce containers of berries. He bought 1 container of each
kind of berry. After he baked the pie, how many ounces of berries did Jason
have left?