Answer: First Option is correct.
Explanation:
Since we have given that
Cost of per pound= $1.28
If a sack of cornmeal weighs = 4 pounds 12 ounces
First we need to convert ounces into pounds ,
as we know that ,

Now, total pounds of cornmeal is given by

Total cost for 4.75 pounds is given by

So, First Option is correct.