Maatwebsite/Laravel-Excel View format - excel

Question

I am loading Laravel view and exporting as Excel using Maatwebsite/Laravel-Excel but my data showing as text but i need to make it as decimal, number. how can i do this. I have already read the documentation but there i cant find solution.
$fileName = 'Receipt Register : From '.date('d-m-Y', strtotime($date_from)).' To '.date('d-m-Y', strtotime($date_to)).($itemDetails ? ' For Item '.$itemDetails->item_code : "");
Excel::create($fileName, function( $excel) use($date_from, $date_to, $request) {
$excel->sheet('Receipt-Register', function($sheet) use($date_from, $date_to, $request) {
$itemDetails = [];
$itemFilterData = [];
$result = Ledger::where('receive_quantity', '!=', NULL)
->where('receive_quantity', ">", 0)
->orderBy('date', 'ASC')
->orderBy('mrn_number',"ASC")
->whereNotNull('mrn_number')
->whereNotNull('mrn_id')
->orderBy('id', "ASC")
->with('department', 'item', 'itemGroup', 'mrn')
->has('mrn', ">", 0);
if($request->date_from) {
$date_from = date('Y-m-d', strtotime($request->date_from));
$result = $result->whereDate('date', '>=', $date_from);
}
if($request->date_to) {
$date_to = date('Y-m-d', strtotime($request->date_to));
$result = $result->whereDate('date', '<=', $date_to);
}
if($request->item_id){
$result = $result->where('item_id', '=', $request->item_id);
$itemDetails = Item::find($request->item_id);
}
$results = $result->get();
$sheet->loadView('export_view',[
'results' => $results,
'date_from' => $date_from,
'date_to' => $date_to,
'itemFilterData' => $itemFilterData
]);
});
})->download('xlsx');