title: how to add sum row in react-admin Datagrid
body: <p>I use react-admin in my project, I use Datagrid with pagination and I need add for every page total row. Firstly I added new item to my data in dataProvider, but in this case total row had all settings like (selectable, expand etc), then I simply add new table after Datagrid but columns do not match with main Datagrid on different screen width..<a href="https://i.stack.imgur.com/Raml8.png" rel="nofollow noreferrer">enter image description here</a>
  I search better way to add total row to datagrid. If you had similar issue pleas share, thanks.</p>