title: material-table: How to make a summary row?
body: <p><a href="https://i.stack.imgur.com/I64e5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/I64e5.png" alt="summary row" /></a></p>
  <p>How can I make a summary row like this using a material table?
  Please help me, thank you.</p>