issue with reduce time to open in laravel - laravel

Question

I am making a report in which user can check due balance of them invoice day wise like between 1-30 days how many amount due. between 30-60 days how many amount due etc for that I have make below function.
I don't know how can I optimize this process time.
public function yajraAgingARSummaryByDueDate()
{
$customerData = GenerateInvoice::select('orders.customer_id','customers.first_name', 'customers.last_name','customers.terms','customers.account_id','customers.account_suffix','invoice.due_date','invoice.invoice_number')
->leftJoin('orders','orders.id','=','invoice.order_id')
->leftJoin('customers', 'customers.id', 'orders.customer_id')
->whereDate('invoice.due_date','<=',date('Y-m-d'))
->whereNotNull('orders.customer_id')
->where('invoice.is_invoice_paid','=','no')
->whereNull('invoice.deleted_at')
->groupBy('orders.customer_id')
->get();
$resultArr = [];
if(count($customerData))
{
foreach($customerData as $key => $row)
{
$current = 0;
$b_1_30 = 0;
$b_31_60 = 0;
$b_61_90 = 0;
$b_over_90 = 0;
$total_ar = 0;
$balance = 0;
$invoiceData = GenerateInvoice::select('invoice.id')
->leftJoin('orders','orders.id','=','invoice.order_id')
->where('orders.customer_id',$row['customer_id'])
->whereDate('invoice.due_date','<=',date('Y-m-d'))
->whereNotNull('orders.customer_id')
->whereNull('invoice.deleted_at')
->where('invoice.is_invoice_paid','=','no')
->get();
if(count($invoiceData))
{
foreach($invoiceData as $row1)
{
$data = GenerateInvoice::select(DB::raw("abs(DATEDIFF(STR_TO_DATE(due_date, '%Y-%m-%d'),CURDATE())) AS Days"),'orders.total_order_value','payments.payment_amount')
->selectRaw(' (select sum(auto_cash_distributions.payment_amount) from auto_cash_distributions where auto_cash_distributions.order_id = invoice.order_id and payment_amount is not null ) as acd_payament_amount ')
->leftJoin('orders','orders.id','=','invoice.order_id')
->leftJoin('payments','payments.order_id','=','orders.id')
->where('invoice.id',$row1['id'])
->whereNotNull('orders.customer_id')
->whereNull('invoice.deleted_at')
->whereNull('payments.deleted_at')
->where('invoice.is_invoice_paid','=','no')
// ->groupBy('payments.invoice_id')
->first();
$days = $data['Days'];
$acd_payament_amount = !(empty($data['acd_payament_amount'])) ? $data['acd_payament_amount'] : 0;
$payment_amount = $data['payment_amount'] + $acd_payament_amount;
$amount = $data['total_order_value'] - $payment_amount;
// H 30/12
$amount = $amount;
$balance =$balance + $amount;
$total_ar = $total_ar + $amount;
// $total_ar = $amount;
if($days>90)
{
$b_over_90 = $b_over_90 + $amount;
}
else if($days <=90 && $days>=61)
{
$b_61_90 = $b_61_90 + $amount;
}
else if($days <=60 && $days>=31)
{
$b_31_60 = $b_31_60 + $amount;
}
else if($days <=30 && $days>=1)
{
$b_1_30 = $b_1_30 + $amount;
}
else
{
$current = $current + $amount;
}
}
}
$resultArr[$key]['account_id'] = $row['account_id'];
$resultArr[$key]['account_suffix'] = $row['account_suffix'];
$resultArr[$key]['first_name'] = $row['first_name'];
$resultArr[$key]['terms'] = $row['terms'];
$resultArr[$key]['due_date'] = $row['due_date'];
$resultArr[$key]['invoice_number'] = $row['invoice_number'];
$resultArr[$key]['balance'] = number_format($balance,2,'.','');
$resultArr[$key]['current'] = number_format($current,2,'.','');
$resultArr[$key]['b_1_30'] = number_format($b_1_30,2,'.','');
$resultArr[$key]['b_31_60'] = number_format($b_31_60,2,'.','');
$resultArr[$key]['b_61_90'] = number_format($b_61_90,2,'.','');
$resultArr[$key]['b_over_90'] = number_format($b_over_90,2,'.','');
$resultArr[$key]['total_ar'] = number_format($total_ar,2,'.','');
}
}
return Datatables::of($resultArr)
->addColumn('due_date',function($sql){
return !empty($sql['due_date']) ? date(get_config('date_format'),strtotime($sql['due_date'])) : '';
})
->addIndexColumn()
->rawColumns(['due_date'])
->make(true);
}
but this code is taking to much time to open. can anybody help me to optimize this code?