Pretty simple issue. I know that that CRUD uses Grid so I did:
$finances = $grant->ref('Finances');
$crud=$tabs->addTab('Finances')->add('CRUD', array('allow_add'=>false, 'allow_del'=>false));
$crud->setModel($finances);
$crud->grid->addTotals(array('requested', 'committed', 'spent'));
This adds the total row but caused the popup displayed by the edit button to have nothing inside - just a blank white popup. Anyway to get totals without "crashing" the CRUD Grid?