diff --git a/app/Models/UserToActivity.php b/app/Models/UserToActivity.php
index 1b795b1..c460df2 100644
--- a/app/Models/UserToActivity.php
+++ b/app/Models/UserToActivity.php
@@ -4,6 +4,7 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
 use App\Models\Activity;
+use Illuminate\Support\Facades\DB;
 
 class UserToActivity extends Model
 {
@@ -29,35 +30,37 @@ class UserToActivity extends Model
 	public static function boot() {
 		parent::boot();
 
-		static::created(function($data) {
-			$activity = Activity::find($data->activity_id);
-			$getWorkingHours = UserToProyek::where('user_id', $data->user_id)->where('proyek_id', $activity->proyek_id)->first();
+        DB::transaction(function(){
+            static::created(function($data) {
+                $activity = Activity::find($data->activity_id);
+                $getWorkingHours = UserToProyek::where([['user_id', $data->user_id],['proyek_id', $activity->proyek_id]])->first();
+                $salary = 0;
+                if($getWorkingHours->uom_standart_rate == "Hour") {
+                    $salary = (doubleval($getWorkingHours->standart_rate) * 8) * (int)$activity->duration * ($getWorkingHours->max_used / 100);
+                } else {
+                    $salary = (doubleval($getWorkingHours->standart_rate) * (int)$activity->duration) * ($getWorkingHours->max_used / 100);
+                }
+                $activity->rencana_biaya += doubleval($salary);
+                $activity->save();
+            });
 
-			$salary = ($getWorkingHours->standart_rate * $activity->duration) * ($getWorkingHours->max_used / 100);
-
-			if($getWorkingHours->uom_standart_rate == "Hour")
-				$salary = ($getWorkingHours->standart_rate * 8) * $activity->duration * ($getWorkingHours->max_used / 100);
-
-			$activity->rencana_biaya += $salary;
-			$activity->save();
-		});
-
-		static::deleted(function($data) {
-			$activity = Activity::find($data->activity_id);
-
-			$getWorkingHours = UserToProyek::where('user_id', $data->user_id)->where('proyek_id', $activity->proyek_id)->first();
-			$salary = ($getWorkingHours->standart_rate * $activity->duration) * ($getWorkingHours->max_used / 100);
-			if($getWorkingHours->uom_standart_rate == "Hour"){
-				$salary = ($getWorkingHours->standart_rate * 8) * $activity->duration * ($getWorkingHours->max_used / 100);
-			}
-
-			$activity->rencana_biaya -= $salary;
-			if ($activity->rencana_biaya < 0) {
-				$activity->rencana_biaya = 0;
-			}
-			$activity->save();
-		});
+            static::deleted(function($data) {
+                $activity = Activity::find($data->activity_id);
+                $getWorkingHours = UserToProyek::where([['user_id', $data->user_id],['proyek_id', $activity->proyek_id]])->first();
+                $salary = 0;
+                if($getWorkingHours->uom_standart_rate == "Hour"){
+                    $salary = (doubleval($getWorkingHours->standart_rate) * 8) * (int)$activity->duration * ($getWorkingHours->max_used / 100);
+                } else {
+                    $salary = (doubleval($getWorkingHours->standart_rate) * (int)$activity->duration) * ($getWorkingHours->max_used / 100);
+                }
+                $activity->rencana_biaya -= doubleval($salary);
 
+                if ($activity->rencana_biaya < 0) {
+                    $activity->rencana_biaya = 0;
+                }
+                $activity->save();
+            });
+        }, 5);
 	}
 
 }