How to sort after the export has finished?

[axelthat]

I have a users table,

name        		        string
completed_orders      		int
assisted_orders		        int
completed_orders_pay_rate	float	
assisted_orders_pay_rate	float

This is my export,

<?php

namespace App\Exports;

use App\Models\User;
use Maatwebsite\Excel\Concerns\Exportable;
use Maatwebsite\Excel\Concerns\FromQuery;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithMapping;

class UsersExport implements FromQuery, WithHeadings, WithMapping
{
    use Exportable;

    /**
     * @return \Illuminate\Support\Collection
     */
    public function query()
    {
        return User::query();
    }

    public function headings(): array
    {
        return ['Name', 'Completed Orders', 'Assisted Orders', 'Payout'];
    }

    public function map($user): array
    {
        return [
            $user->name,
            $user->completed_orders,
            $user->assisted_orders,
            '$' .
            number_format(
                $user->completed_orders * $user->completed_orders_pay_rate +
                    $user->assisted_orders * $user->assisted_orders_pay_rate
            ),
        ];
    }
}

I want to sort the results by the field "Payout". How can I do it? Ofc I can calculate payout using SQL aggregate functions at fetch time but I don't want to do that. I have a bigger reason not to do that for my project case. I want to apply sorting after I get the data from the database.