Windows RT licenses reportedly costing $85
 

Windows RT, which we're obliged to remind you is the version that runs on ARM hardware, will reportedly cost between $80 and $95 for OEMs to license. Whilst at Computex, VR-Zone asked various companies the cost differences between building Android slates (which Google offers for free) and Microsoft's latest variant. The anonymous enterprises responded with figures between $80 and $95 -- averaging out at $85. If true, then Metro-powered tablets will cost several hundred dollars more than their Android-running rivals -- which would certainly hamper its entry into the market.

http://www.engadget.com/2012/06/13/windows-rt-cost/