Use the integers 0, -2, -3, -4, -5, -6, -7, -8, and 0 to fill in a 3x3 magic square...

Use the integers 0, -2, -3, -4, -5, -6, -7, -8, and 0 to fill in a 3x3 magic square so tht every row, column, and diagonal has the same sum. What is the magic sum?