title: Excel Conditional formatting with weighted total
body: <p>I have sets of values in rows in Excel
  First row contains weights of how much each value in each column contributes to weighted total.
  Now, I want to mark in each following row the value that contributed to the weighted total the most, by changing its background. I played with conditional formatting, but my Excel skills are modest, to say the least.
  So, how do I do that?</p>