OK, I see it. That's comparing the "basic cost", of buying the spell as a standalone power, with the "actual cost", which is 1/5 of that. The easy way to explain it is with an example.
Say you have Sorcerous Empowerment 3, which costs [45]. Let's look at what spells from p.6 you could buy:
- You can buy 2 levels of Cold, which has a basic cost of [32].
- You could buy 5 levels of Create Fire, basic cost [40].
- You cannot buy Deflect Energy, because it costs [49].
- You can buy 5 levels of Explosive Fireball [45].
- You can buy 2 levels of Extinguish Fire [30].
Now you spend another 9 points on Sorcerous Empowerment, taking you up to level 4, which costs [54]. Now:
- You can buy Cold up to level 3, which has a basic cost of [48].
- You can buy Create Fire up to level 6, basic cost [48].
- You can now buy Deflect Energy [49].
- You can buy Explosive Fireball up to level 6 [54].
- You can buy Extinguish Fire up to level 3[45].
So, for your Haste example, you can buy version of it that,
with all their modifiers, fit within your Sorcerous Empowerment. As you buy up Sorcerous Empowerment, you can improve the Haste.