The Attila Barbell Company makes bars for weightlifting. The weights of the bars are independent and are normally distributed
with a mean of 720 ounces (45 pounds) and a standard deviation of 4 ounces. The bars are shipped 10 in a box to the retailers.
The weights of the empty boxes are normally distributed with a mean of 320 ounces and a standard deviation of 8 ounces. The
weights of the boxes filled with 10 bars are expected to be normally distributed with a mean of 7,520 ounces and a standard
deviation of