diff --git a/Admin/Install/attributes.json b/Admin/Install/attributes.json
index 7c0fb78..6522ba6 100755
--- a/Admin/Install/attributes.json
+++ b/Admin/Install/attributes.json
@@ -91,10 +91,10 @@
         "values": []
     },
     {
-        "name": "maximum_order_interval",
+        "name": "minimum_order_quantity",
         "l11n": {
-            "en": "Maximum order interval",
-            "de": "Maximale Bestellhäufigkeit"
+            "en": "MOQ",
+            "de": "Mindestbestellmenge"
         },
         "value_type": 1,
         "is_custom_allowed": true,
@@ -104,10 +104,23 @@
         "values": []
     },
     {
-        "name": "minimum_order_quantity",
+        "name": "order_quantity_steps",
         "l11n": {
-            "en": "MOQ",
-            "de": "Mindestbestellmenge"
+            "en": "Order quantity steps",
+            "de": "Bestellschritte"
+        },
+        "value_type": 1,
+        "is_custom_allowed": true,
+        "validation_pattern": "",
+        "is_required": false,
+        "default_value": "",
+        "values": []
+    },
+    {
+        "name": "minimum_stock_range",
+        "l11n": {
+            "en": "Minimum stock range",
+            "de": "Mindestreichweite"
         },
         "value_type": 1,
         "is_custom_allowed": true,
diff --git a/Admin/Install/db.json b/Admin/Install/db.json
index 05046de..01ff746 100755
--- a/Admin/Install/db.json
+++ b/Admin/Install/db.json
@@ -43,6 +43,11 @@
                 "type": "TINYINT(1)",
                 "null": false
             },
+            "itemmgmt_item_createdat": {
+                "name": "itemmgmt_item_createdat",
+                "type": "DATETIME",
+                "null": false
+            },
             "itemmgmt_item_parent": {
                 "name": "itemmgmt_item_parent",
                 "type": "INT(11)",
diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index bb0fbf3..7452a6f 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -214,7 +214,7 @@ final class ApiController extends Controller
         $uploadedFiles = $request->files['item_profile_image'] ?? [];
         if (!empty($uploadedFiles)) {
             // upload image
-            $uploaded = $this->app->moduleManager->get('Media')->uploadFiles(
+            $uploaded = $this->app->moduleManager->get('Media', 'Api')->uploadFiles(
                 names: [],
                 fileNames: [],
                 files: $uploadedFiles,
@@ -676,7 +676,7 @@ final class ApiController extends Controller
 
         $path = $this->createItemDir($item);
 
-        $uploaded = $this->app->moduleManager->get('Media')->uploadFiles(
+        $uploaded = $this->app->moduleManager->get('Media', 'Api')->uploadFiles(
             names: $request->getDataList('names'),
             fileNames: $request->getDataList('filenames'),
             files: $uploadedFiles,
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 26df7d0..30e8971 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -216,62 +216,15 @@ final class BackendController extends Controller
         $reserved = [];
         $ordered  = [];
         if ($this->app->moduleManager->isActive('WarehouseManagement')) {
-            $itemIds = \array_map(function (Item $item) { return $item->id;
+            $itemIds = \array_map(function (Item $item) {
+                return $item->id;
             }, $items);
-            $itemIdsString = \implode(',', $itemIds);
 
-            // @todo only select sales stock. Therefore we need a place to define the sales stock(s)
-            $temp = \Modules\WarehouseManagement\Models\StockDistributionMapper::getAll()
-                ->where('item', $itemIds, 'IN')
-                ->execute();
+            $distributions = \Modules\WarehouseManagement\Models\StockMapper::getStockDistribution($itemIds);
 
-            foreach ($temp as $t) {
-                if (!isset($dists[$t->item])) {
-                    $dists[$t->item] = [];
-                }
-
-                // @todo These numbers might need adjustments for delivery notes/invoices depending on
-                // how we implement them in the warehouse management (maybe flag them in the transaction protocol as reserved?)
-                // also remember the SD issue where delivery notes can be technically still in stock -> stock value still belongs to company
-                // solution: "just" do a soft adjust of the available numbers?! but don't change the actual stock in the db
-                // the SD solution where actually delivered delivery notes can be adjusted after "archiving" will not be allowed
-                // to allow them to see what happened with such a delivery note maybe we can implement a view shows how many of the items are
-                // actually still outstanding. This shouldn't be anything special since we need importing of delivery notes anyways and marking
-                // old delivery note elements in a way to show which line items or even sub-line items got invoiced/returned etc.
-                $dists[$t->item][] = $t;
-            }
-
-            $stockIdentifier = StockIdentifierType::NONE;
-
-            $sql = <<<SQL
-            SELECT billing_bill_element.billing_bill_element_item,
-                billing_type.billing_type_name,
-                SUM(billing_bill_element.billing_bill_element_quantity) AS quantity
-            FROM billing_bill_element
-            LEFT JOIN itemmgmt_item ON billing_bill_element.billing_bill_element_item = itemmgmt_item.itemmgmt_item_id
-            LEFT JOIN billing_bill ON billing_bill_element.billing_bill_element_bill = billing_bill.billing_bill_id
-            LEFT JOIN billing_type ON billing_bill.billing_bill_type = billing_type.billing_type_id
-            WHERE billing_bill_element.billing_bill_element_item IN ({$itemIdsString})
-                AND itemmgmt_item.itemmgmt_item_stockidentifier != {$stockIdentifier}
-                AND billing_type.billing_type_name IN ('sales_order_confirmation', 'purchase_order')
-            GROUP BY billing_bill_element.billing_bill_element_item, billing_type.billing_type_name;
-            SQL;
-
-            $query   = new Builder($this->app->dbPool->get());
-            $results = $query->raw($sql)->execute()->fetchAll(\PDO::FETCH_ASSOC);
-
-            foreach ($results as $result) {
-                if (!isset($reserved[(int) $result['billing_bill_element_item']])) {
-                    $reserved[(int) $result['billing_bill_element_item']] = 0;
-                    $ordered[(int) $result['billing_bill_element_item']]  = 0;
-                }
-
-                if ($result['billing_type_name'] === 'sales_order_confirmation') {
-                    $reserved[(int) $result['billing_bill_element_item']] += (int) $result['quantity'];
-                } else {
-                    $ordered[(int) $result['billing_bill_element_item']] += (int) $result['quantity'];
-                }
-            }
+            $dists    = $distributions['dists'];
+            $reserved = $distributions['reserved'];
+            $ordered  = $distributions['ordered'];
         }
 
         $view->data['dists']    = $dists;
@@ -457,10 +410,8 @@ final class BackendController extends Controller
             ->execute();
 
         // Get item profile image
-        // It might not be part of the 5 newest item files from above
-        // @todo It would be nice to have something like this as a default method in the model e.g.
-        // ItemManagement::getRelations()->with('types')->where(...);
-        // This should return the relations and NOT the model itself
+        // @feature Create a new read mapper function that returns relation models instead of its own model
+        //      https://github.com/Karaka-Management/phpOMS/issues/320
         $query   = new Builder($this->app->dbPool->get());
         $results = $query->selectAs(ItemMapper::HAS_MANY['files']['external'], 'file')
             ->from(ItemMapper::TABLE)
diff --git a/Models/ItemMapper.php b/Models/ItemMapper.php
index 1ed18a3..6706b63 100755
--- a/Models/ItemMapper.php
+++ b/Models/ItemMapper.php
@@ -52,6 +52,7 @@ final class ItemMapper extends DataMapperFactory
         'itemmgmt_item_purchaseprice'   => ['name' => 'itemmgmt_item_purchaseprice', 'type' => 'Serializable', 'internal' => 'purchasePrice'],
         'itemmgmt_item_parent'          => ['name' => 'itemmgmt_item_parent', 'type' => 'int', 'internal' => 'parent'],
         'itemmgmt_item_unit'            => ['name' => 'itemmgmt_item_unit', 'type' => 'int', 'internal' => 'unit'],
+        'itemmgmt_item_createdat'            => ['name' => 'itemmgmt_item_createdat', 'type' => 'DateTimeImmutable', 'internal' => 'createdAt'],
     ];
 
     /**
diff --git a/Theme/Backend/item-create.tpl.php b/Theme/Backend/item-create.tpl.php
index 7893bdd..f6185e1 100755
--- a/Theme/Backend/item-create.tpl.php
+++ b/Theme/Backend/item-create.tpl.php
@@ -616,10 +616,7 @@ echo $this->data['nav']->render(); ?>
 </div>
 
 <!--
-@todo
-    maybe put a master variations selection at the beginning so that you need to change it for other variations...
-    this way you will however not be able to see all at once only one at a time
-    make container in packaging department that can be used by packaging for sales and purchase
+@todo make container in packaging department that can be used by packaging for sales and purchase
     Shelf life (stock???)
     Packaging dimension+weight+units for different types (pallet, case etc.)
     Language for all variations based on variables: e.g. ${size} T-shirt in ${color}
diff --git a/Theme/Backend/item-view.tpl.php b/Theme/Backend/item-view.tpl.php
index b94934f..ec1a6a6 100644
--- a/Theme/Backend/item-view.tpl.php
+++ b/Theme/Backend/item-view.tpl.php
@@ -323,7 +323,7 @@ echo $this->data['nav']->render();
                         <?php endif; ?>
 
                         <?php
-                        $monthlySalesCosts = SalesBillMapper::getItemMonthlySalesCosts($item->id, (new SmartDateTime('now'))->createModify(-1), new SmartDateTime('now'));
+                        $monthlySalesCosts = SalesBillMapper::getItemMonthlySalesCosts([$item->id], (new SmartDateTime('now'))->createModify(-1), new SmartDateTime('now'));
                         if (!empty($monthlySalesCosts)) : ?>
                         <div class="col-xs-12 col-lg-6">
                             <section class="portlet">