not working sum fields (score) for chart consoleTv in laravel

$chart = Charts::create('bar', 'highcharts')->title("Kehadiran")
    ->elementLabel("Total")->dimensions(1000, 400)
    ->labels($abc->pluck('created_at'))->values($abc->pluck('total'));

$abc = DB::table('ups')->select('ups.created_at', DB::raw('sum(ups.score) as total'))
    ->groupBy('created_at')->get();

my view char

via Chebli Mohamed