Question

What's the answer to 23 and how?

Answer 1

 $4.25/1lbs x x / 2.5lbs = $10.63

Answer 2

Well you have to multiply  $ 4.25 * 2.5
     1
    2
4. 25
    2.5
    2155
 + 8500
    10.655


so your answer will be $10.70.