To find the average you add all three numbers together and then divide by three since you added three.
$38,750.00 + $42,500.00 + $42,500.00 = $123,750.00
$123,750.00 ÷ 3 = $41,250
So your answer is $41,250
$21 for 3 pounds of steak the rate would be 7 because 21/3= 7
The area is 24 square inches so it would cost $480
Your answer will be 5xplus10