He can buy 1 1\4 ounce for a dollar or 1.25 ounces or depending on your answer choice 1 ounce. All those answer are right
You would divide 127 by 8 then multiply that answer by three sirts each.
You've got a nice 66 sitting right in the middle of that left side, so wouldn't it be nice if you could get rid of everything else? Well, with a little division and multiplication, we can!
7 7 6 6 5 5 → (7 ÷ 7) × 66 × (5 ÷ 5) = 1 × 66 × 1 = 66