I paid $5.75 per sheet, so $2.60 is very good.
What size bit? The one I use is a huge hunk of metal and just plows through this stuff, a 1.25" bit. This stuff cuts very easily, if you are using one of the little 1/8" bits I would not go 0.1"...but probably any of the 1/4" bits should be fine.
And I cut all of my V-Carve passes in this stuff twice...does it make a difference? It makes me feel better