It will cost $8.32 to make four 9-inch lemon pies.
Since 16 tablespoons go into one cup, 8 tablespoons will go into half a cup. This means that it will take 4 lemons to make 1 pie, therefore you multiply $0.52 by 4, which equals to $2.08.
One lemon pie costs $2.08, so you just multiply that by 4 again to get the final answer of $8.32.