baoshi-was/database/seeds/WaybillCalculatesSeeder.php

<?php

use Illuminate\Database\Seeder;

class WaybillCalculatesSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        \App\WaybillPayoff::create([
            'waybill_id'=>1,
            'total_expense'=>584,
            'total_receivable'=>2015,
            'gross_margin'=>1853.5,
            'gross_profit_rate'=>0.58
        ]);
    }
}