But he admitted that the process isn't foolproof.
"Guesstimates come into the picture for components that don't really have an existing cost estimate, for example a ~150 PPI [pixel-per-inch] display on an iPad Mini or a magnesium casing for a Microsoft Surface," Singh said in his follow-up email. "Here, part of the guesstimate involves finding out the cost drivers for that particular component based on existing estimates."
Microsoft will begin selling the Surface RT on Oct. 26 at its online store, and at both its established and temporary "pop-up" retail outlets.
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