Can somebody explain this to me?

A quick check of the Staples web site shows two nearly identical reams of paper, one costing $4.99 and the other costing $6.29.

I said "nearly identical". What's the difference between these 2 reams of paper (besides the $1.30 in price)?

The ream of paper costing $6.29 is "3-Hole-Punched".

Why does paper with holes punched in it cost more than paper without holes? Don't you get less paper if there are holes punched in it?