Answer: Option 'c' is correct.
Explanation:
Since we have given that
Number of bushels of peanuts = 800
Price of each bushels of peanuts = $5.85
And there is mark up rate = 33%
So, Total price would be

If there is spoilage rate = 21%
So, the remaining rate would be 1-0.21=0.79
so, Number of remaining bushels of peanuts would be

So, Selling price per bushel would be

Hence, Option 'c' is correct.