It drops to $127/point *for those additional points.*
in other words, 125 points costs a total of
$23,375. Which is $187/point.
150 points costs a total of $26,550. Which is $177/point.
if you were already going to buy 125 points, one way to look at the difference between 150 points and 125 points is just the difference between the two: $23,375 vs $26,550. The difference is $3,175, and you get 25 points. So if you divide the difference of $3,175 by the extra points you’d be buying (25), it is as if you are only paying $127 per point for those extra 25 points. It is NOT that all 150 points are $127/point. In this way of looking at it, the first 125 points are $187/point and the last 25 are $127/point.