Priceless　Knowledge

There　was　an　engineer　who　had　an　exceptional　gift　for　fixing　all　things　mechanical．After　serving　his　company　loyally　for　over　25　years,he　happily　retired．
Several　years　later　his　company　contacted　him　regarding　a　seemingly　imˉpossible　problem　they　were　having　with　one　of　their　multi—million　dollar　machines．They　had　tried　everything　and　everyone　else　to　get　the　machine　fixed,but　to　no　avail．
In　desperation,they　called　on　the　retired　engineer　who　had　solved　so　many　of　their　problems　in　the　past．The　engineer　reluctantly　took　the　challenge．He　spent　a　day　studying　the　huge　machine．
At　the　end　of　the　day　he　marked　a　small　X　in　chalk　on　a　particular　component　of　the　machine　and　proudly　stated,“This　is　where　your　problem　is．”The　part　was　replaced　and　the　machine　worked　perfectly　again．
The　company　received　a　bill　for　＄20,001　from　the　engineer　for　his　service．They　demanded　an　itemized　accounting　of　his　charges．
The　engineer　responded　briefly:
One　chalk　mark．．．．．．．．．．．．＄1
Knowing　where　to　put　it．．．＄20,000