Answer:
640
Step-by-step explanation:
22 x 28 = 616
4 x 6 = 24
616 + 24 = 640 fit
ANSWER

EXPLANATION
To find the average weight per bushel, we add all the three weight and divide by 3.

We convert all the mixed numbers to improper fraction to obtain,

The least common denominator for the fractions in the numerator is 8.
This implies that,

This simplifies to

This gives us,

