Day Fifteen - Is Recycled Paper More Expensive?

I had a shift in McGill Bookstore this afternoon.
Text department is the place where I usually work.
But this time I was scheduled in the stationary.
The bookstore isn't busy at all these days and I could take my time wandering around my station.
It seems the bookstore stocks lots of recycled stuff.
I saw so many notebooks and agendas with 100% recycled paper sign on them.
The interesting thing was that I found the recycled paper was more expensive than regular ones.
For instance, prices of non-recycled VS recycled 3*5 in, 100 pages plain index cards are $0.79 VS $1.79.
Non-recycled 300 pages lined paper notebook is $3.59 while 120 sheets recycled one is $5.79.

Is recycled paper more expensive?
This goes beyond my knowledge.
The only reason I can think of is that refining and treatment of recycled paper are more costly than traditional means of producing paper.

After a quick research, I came up with the following conclusion:
30% post-consumer waste paper is competitive with virgin paper.
When ordering in large quantities, the price can actually be less than virgin paper.
And any recycled paper higher than 30% pcw begins to increase in price.
At this point, 100% is more expensive than 30% and virgin.
However, this is the most environmentally preferable alternative - paper form paper and not from trees.

No wonder they are more expensive than virgin paper notebooks.
They are 100% recycled. They are from paper not from trees.
Then, why don't we grow more trees and use 30% post-consumer waste paper instead of 100% one?