cast number to float

app/Models/AssignMaterial.php

@@ -15,6 +15,12 @@ class AssignMaterial extends Model
 
     protected $fillable = [
         'proyek_id', 'activity_id', 'material_id', 'qty_planning', 'budget', 'plan_date','created_at', 'created_by', 'updated_at', 'updated_by'
+	];
+
+	protected $casts = [
+        'id' => 'integer',
+        'price' => 'float',
+        'qty_planning' => 'float',
     ];
 
 	public static function boot() {
@@ -23,13 +29,13 @@ class AssignMaterial extends Model
 		static::created(function($data) {
 			$activity = Activity::find($data->activity_id);
 			$material = RequestMaterial::where("id", $data->material_id)->first();
-			$activity->rencana_biaya += $activity->rencana_biaya + ($material->price * $data->qty_planning);
+			$activity->rencana_biaya += floatval($material->price) * floatval($data->qty_planning);
 			$activity->save();
 		});
 
 		static::deleted(function($data) {
 			$activity = Activity::where('id', $data->activity_id)->first();
-			$activity->rencana_biaya -= $data->budget * $data->qty_planning;
+			$activity->rencana_biaya -= floatval($data->budget) * floatval($data->qty_planning);
 			$activity->save();
 		});