如何使用Laravel进行平衡？

Question

我的控制器：

$table = CashBook::select(
  DB::raw('DATE(created_at) as date'),
  DB::raw('SUM(amountOut) as dr'),
  DB::raw('SUM(amountIN) as cr')
)->groupBy('date')
->get();

return view('cashbook.cashbook')->with(['table' => $table]);

我想要实施的表格：

@foreach($table as $row)
  <tr>
    <td>{{date('d/m/Y', strtotime($row->date))}}</td>
    <td>TK. {{number_format($row->cr,2)}}</td>
    <td>TK. {{number_format($row->dr,2)}}</td>
    @php
    $tbalance = $row->cr - $row->dr;
    @endphp
    <td>TK. {{number_format($tbalance,2)}}</td>
</tr>
@endforeach

我正在尝试平衡借记和信用。但我无法在数组中取<td>TK. {{number_format($tbalance,2)}}</td>并将当前余额与前一个相加。