title: Search column B for last two unempty field and get both of their column A counterparts
body: <p>I wish to find the last two payments in Column B (but not always above each other) and then obtain the date that is in column A for those payments.  Then have the number of days between these payments shown in the top of Column B.</p>
  
  <p>All information starts from row 10 downwards.</p>
  
  <p>What formula could I use to get this information ?</p>