diff --git a/Modules/Product/Http/Controllers/ProductController.php b/Modules/Product/Http/Controllers/ProductController.php
index 4d5ba8e5..8645b0a9 100644
--- a/Modules/Product/Http/Controllers/ProductController.php
+++ b/Modules/Product/Http/Controllers/ProductController.php
@@ -9,8 +9,8 @@ use Illuminate\Routing\Controller;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\Facades\Storage;
 use Modules\Product\Entities\Product;
-use Modules\Product\Http\Requests\ProductCreateRequest;
-use Modules\Product\Http\Requests\ProductUpdateRequest;
+use Modules\Product\Http\Requests\StoreProductRequest;
+use Modules\Product\Http\Requests\UpdateProductRequest;
 use Modules\Upload\Entities\Upload;
 
 class ProductController extends Controller
@@ -30,7 +30,7 @@ class ProductController extends Controller
     }
 
 
-    public function store(ProductCreateRequest $request) {
+    public function store(StoreProductRequest $request) {
         $product = Product::create($request->except('image'));
 
         if ($request->has('image')) {
@@ -64,7 +64,7 @@ class ProductController extends Controller
     }
 
 
-    public function update(ProductUpdateRequest $request, Product $product) {
+    public function update(UpdateProductRequest $request, Product $product) {
         $product->update($request->except('image'));
 
         if ($request->has('image')) {
diff --git a/Modules/Product/Http/Requests/ProductCreateRequest.php b/Modules/Product/Http/Requests/StoreProductRequest.php
similarity index 96%
rename from Modules/Product/Http/Requests/ProductCreateRequest.php
rename to Modules/Product/Http/Requests/StoreProductRequest.php
index 865721f8..170bf44e 100644
--- a/Modules/Product/Http/Requests/ProductCreateRequest.php
+++ b/Modules/Product/Http/Requests/StoreProductRequest.php
@@ -5,7 +5,7 @@ namespace Modules\Product\Http\Requests;
 use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Support\Facades\Gate;
 
-class ProductCreateRequest extends FormRequest
+class StoreProductRequest extends FormRequest
 {
     /**
      * Get the validation rules that apply to the request.
diff --git a/Modules/Product/Http/Requests/ProductUpdateRequest.php b/Modules/Product/Http/Requests/UpdateProductRequest.php
similarity index 96%
rename from Modules/Product/Http/Requests/ProductUpdateRequest.php
rename to Modules/Product/Http/Requests/UpdateProductRequest.php
index fd4d5377..8aa052b0 100644
--- a/Modules/Product/Http/Requests/ProductUpdateRequest.php
+++ b/Modules/Product/Http/Requests/UpdateProductRequest.php
@@ -6,7 +6,7 @@ use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Validation\Rule;
 
-class ProductUpdateRequest extends FormRequest
+class UpdateProductRequest extends FormRequest
 {
     /**
      * Get the validation rules that apply to the request.
diff --git a/Modules/Sale/Entities/Sale.php b/Modules/Sale/Entities/Sale.php
index fcd84bc3..b07f364b 100644
--- a/Modules/Sale/Entities/Sale.php
+++ b/Modules/Sale/Entities/Sale.php
@@ -15,6 +15,10 @@ class Sale extends Model
         return $this->hasMany(SaleDetails::class, 'sale_id', 'id');
     }
 
+    public function getReferenceAttribute($value) {
+        return strtoupper($value) . '_' . str_pad($this->attributes['id'], 6, '0', STR_PAD_LEFT);
+    }
+
     public function getShippingAmountAttribute($value) {
         return $value / 100;
     }
diff --git a/Modules/Sale/Http/Requests/StoreSaleRequest.php b/Modules/Sale/Http/Requests/StoreSaleRequest.php
index 0608e202..56236188 100644
--- a/Modules/Sale/Http/Requests/StoreSaleRequest.php
+++ b/Modules/Sale/Http/Requests/StoreSaleRequest.php
@@ -16,7 +16,7 @@ class StoreSaleRequest extends FormRequest
     {
         return [
             'customer_id' => 'required|numeric',
-            'reference' => 'required|string|max:255|unique:sales,reference',
+            'reference' => 'required|string|max:255',
             'tax_percentage' => 'required|integer|min:0|max:100',
             'discount_percentage' => 'required|integer|min:0|max:100',
             'shipping_amount' => 'required|numeric',
diff --git a/Modules/Sale/Http/Requests/UpdateSaleRequest.php b/Modules/Sale/Http/Requests/UpdateSaleRequest.php
index fc709b78..8cda60f0 100644
--- a/Modules/Sale/Http/Requests/UpdateSaleRequest.php
+++ b/Modules/Sale/Http/Requests/UpdateSaleRequest.php
@@ -16,7 +16,7 @@ class UpdateSaleRequest extends FormRequest
     {
         return [
             'customer_id' => 'required|numeric',
-            'reference' => 'required|string|max:255|unique:sales,reference,' . $this->sale->id,
+            'reference' => 'required|string|max:255',
             'tax_percentage' => 'required|integer|min:0|max:100',
             'discount_percentage' => 'required|integer|min:0|max:100',
             'shipping_amount' => 'required|numeric',
diff --git a/Modules/Sale/Resources/views/create.blade.php b/Modules/Sale/Resources/views/create.blade.php
index a7d6753d..740c8aed 100644
--- a/Modules/Sale/Resources/views/create.blade.php
+++ b/Modules/Sale/Resources/views/create.blade.php
@@ -30,7 +30,7 @@
                                 <div class="col-lg-4">
                                     <div class="form-group">
                                         <label for="reference">Reference <span class="text-danger">*</span></label>
-                                        <input type="text" class="form-control" name="reference" required>
+                                        <input type="text" class="form-control" name="reference" required readonly value="SL">
                                     </div>
                                 </div>
                                 <div class="col-lg-4">
diff --git a/Modules/Sale/Resources/views/edit.blade.php b/Modules/Sale/Resources/views/edit.blade.php
index 8f1c4c6d..931b8ed0 100644
--- a/Modules/Sale/Resources/views/edit.blade.php
+++ b/Modules/Sale/Resources/views/edit.blade.php
@@ -30,7 +30,7 @@
                                 <div class="col-lg-4">
                                     <div class="form-group">
                                         <label for="reference">Reference <span class="text-danger">*</span></label>
-                                        <input type="text" class="form-control" name="reference" required value="{{ $sale->reference }}">
+                                        <input type="text" class="form-control" name="reference" required value="{{ $sale->reference }}" readonly   >
                                     </div>
                                 </div>
                                 <div class="col-lg-4">
diff --git a/config/datatables-buttons.php b/config/datatables-buttons.php
index 78f85bd7..d1525f91 100644
--- a/config/datatables-buttons.php
+++ b/config/datatables-buttons.php
@@ -1,9 +1,4 @@
 <?php
-$dom = "
-            B<'row'<'col-md-6'l><'col-md-6'f>> .
-            'tr' .
-            <'row'<'col-md-5'i><'col-md-7'p>>
-        ";
 
 return [
     /*
@@ -81,16 +76,18 @@ return [
         /*
          * Default columns to generate when not set.
          */
-        'columns' => 'id,add your columns,created_at,updated_at',
+        'columns' => 'id,db columns,created_at',
 
         /*
          * Default buttons to generate when not set.
          */
-        'buttons' => 'create,export,print,reset,reload',
+        'buttons' => 'excel,print,reset,reload',
 
         /*
          * Default DOM to generate when not set.
          */
-        'dom'     => 'Bfrtip',
+        'dom'     => "<'row'<'col-md-3'l><'col-md-5 mb-2'B><'col-md-4'f>> .
+                                'tr' .
+                                <'row'<'col-md-5'i><'col-md-7 mt-2'p>>",
     ],
 ];
diff --git a/resources/views/vendor/datatables/print.blade.php b/resources/views/vendor/datatables/print.blade.php
index 40655f5e..e6b69e15 100644
--- a/resources/views/vendor/datatables/print.blade.php
+++ b/resources/views/vendor/datatables/print.blade.php
@@ -1,13 +1,12 @@
 <!DOCTYPE html>
 <html lang="en">
     <head>
-        <title>Print Table</title>
+        <title>All Data</title>
         <meta charset="UTF-8">
         <meta name=description content="">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
         <!-- Bootstrap CSS -->
         <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet">
-        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
         <style>
             body {margin: 20px}
         </style>