Report is unclear that this refers only to the labor cost, and what's involved in that labor. Is that $3.99 for someone clipping half a dozen parts together/wa

Report is unclear that this refers only to the labor cost, and what's involved in that labor. Is that $3.99 for someone clipping half a dozen parts together/watching robots, or is it $3.99 for 18 hours of soldering? The parts cost around $188, according to iSuppli (http://www.isuppli.com/Teardowns/News/Pages/iPhone-4-Carries-Bill-of-Materials-of-187-51-According-to-iSuppli.aspx http://www.isuppli.com/Teardowns/News/Pages/iPhone-4-Carries...)