title: Influencing Solr search results with a field value
body: <p>I've recently started experimenting with Solr. My data is indexed and searchable. My problem is in the sorting. I have three fields: Author, Title, Sales.</p>
  
  <p>I would like to search against the author &amp; title fields, but have the sales value influence the score so that matches with higher sales move toward the top, even if the initial match score is not the highest. </p>
  
  <p>Simply sorting by sales does not produce valid results as a result with a near 0 score for the search term, but a lot of sales in general could end up above a perfect match for the term that has never been sold.</p>
  
  <p>I am seeing results that, while great term matches, are not necessarily the product I want showing at the top of the list.</p>