First, convert 5 pounds into ounces by multiplying 5 by 16 (number of ounces in a pound):
16 * 5 = 80 ounces
Next, you divide by the amount of sections (in your case, 6):
80 ÷ 6 = 20 ounces
There are 20 ounces in each of the six containers :)
Hope that helped!