liwo/database/factories/CostFactory.php

<?php

/** @var Factory $factory */

use Carbon\Carbon;
use App\Models\Cost;
use Faker\Generator as Faker;

$factory->define(Cost::class, function (Faker $faker) {
    return [
        'business_id' => random_int(1,5000),
        'type' => $type = $faker->boolean() ? 'users' : 'files',
        'month' => jdate(Carbon::now()->subDays(random_int(0,90)))->format("Y-m-01"),
        'amount' => random_int(1,1000),
        'fee' => $type === 'users' ? enum("business.fee.user") : enum("business.fee.file"),
        'duration' => random_int(1,60),
        'created_at' => Carbon::now()->subMinutes(random_int(1, 1000)),
    ];
});