Summery cell value in maatwebsite/excel sheet has no prefix “$” sign

[sergeynilov]

In Laravel 8 app making excel page with maatwebsite/excel 3.1 I calculated some summery values by
summerizing column by calculating summery cell and applying formula, like :

    $priceSummaryCell = 'G'. ($footerSummeryRowNumber);

    $priceSummaryCellFormula = $priceStartCell.':'.$priceEndCell;

    $event->sheet->setCellValue($priceSummaryCell, '=SUM('.$priceSummaryCellFormula.')');

also I set dollar sign for G column with method:

    public function columnFormats(): array
    {
        return [
            ...
            'G' => NumberFormat::FORMAT_CURRENCY_USD,   // expire_date
        ];
    }

As a result I see : https://prnt.sc/12fgljb
summery value has no prefix “$” sign. Can I set it somehow?

Thanks!