title: Find last row of a specific range of columns
body: <p>I have a table that ranges from "A:EV".</p>
  
  <p>I want to find the last row of only range "A:DD".</p>
  
  <p>The columns might have blank cells, so I need to go through all and find the furthest row of columns A to DD.</p>
  
  <p>How can I code it?</p>