Heat oven to 350° F. Spray bottom only of 8-inch square pan with cooking spray. In large bowl, mix 1 1/2 cups flour, the 1/2 cup sugar, baking powder, baking soda and salt. Stir in yogurt, oil and eggs just until flour is moistened. Chop fruit salad. Sprinkle 2 tablespoons flour over fruit mix. Stir fruit into batter. Pour into pan.