what we have to know is what fracion of 8 oz is 3 oz?
it's \(\frac{3}{8}\).
now we multiply this by 1200:
\(1200* \frac{3}{8}\).
i'll simplify by dividing by 2:
\(600* \frac{3}{4}\).
\(300* \frac{3}{2}\).
\(150* \frac{3}{1}\).
which is 450. So, the answer is 450 calories!