diff --git a/commodity/commodityservice.cpp b/commodity/commodityservice.cpp
index adbfb82..ecb1d3f 100644
--- a/commodity/commodityservice.cpp
+++ b/commodity/commodityservice.cpp
@@ -17,3 +17,15 @@ QList<QSharedPointer<ShopItem> > CommodityService::shopItems()
 
     return ret;
 }
+
+void CommodityService::addedToVoucher(int itemId, int countAdded)
+{
+    QSharedPointer<CommodityData> commodity = loadById(itemId);
+
+    if (!commodity.isNull())
+    {
+        commodity->setCount(commodity->count() - countAdded);
+    }
+
+    update(commodity);
+}
diff --git a/commodity/commodityservice.h b/commodity/commodityservice.h
index 8527aef..4f67690 100644
--- a/commodity/commodityservice.h
+++ b/commodity/commodityservice.h
@@ -13,6 +13,7 @@ public:
     // ISellableService interface
 public:
     QList<QSharedPointer<ShopItem> > shopItems() override;
+    void addedToVoucher(int itemId, int countAdded) override;
 };
 
 #endif // COMMODITYSERVICE_H
diff --git a/commodity/data/commoditydata.cpp b/commodity/data/commoditydata.cpp
index 5a12089..2463564 100644
--- a/commodity/data/commoditydata.cpp
+++ b/commodity/data/commoditydata.cpp
@@ -8,7 +8,7 @@ CommodityData::CommodityData(QObject *parent)
     m_price = 0;
     m_vat = Enums::NONE;
 }
-int CommodityData::id() const
+int CommodityData::id()
 {
     return m_id;
 }
@@ -17,7 +17,7 @@ void CommodityData::setId(int id)
 {
     m_id = id;
 }
-QString CommodityData::name() const
+QString CommodityData::name()
 {
     return m_name;
 }
@@ -83,6 +83,21 @@ void CommodityData::setCount(int count)
     m_count = count;
 }
 
+QDecDouble CommodityData::unitPrice()
+{
+    return price();
+}
+
+Enums::VatType CommodityData::vatType()
+{
+    return vat();
+}
+
+QString CommodityData::pluginId()
+{
+    return "COMMODITY";
+}
+
 
 
 
diff --git a/commodity/data/commoditydata.h b/commodity/data/commoditydata.h
index 3fb5c42..462b4f1 100644
--- a/commodity/data/commoditydata.h
+++ b/commodity/data/commoditydata.h
@@ -14,9 +14,9 @@
 class CommodityData : public ShopItem
 {
     Q_OBJECT
+    Q_PROPERTY(QString code READ code WRITE setCode)
     Q_PROPERTY(QString name READ name WRITE setName)
     Q_PROPERTY(QString shortName READ shortName WRITE setShortName)
-    Q_PROPERTY(QString code READ code WRITE setCode)
     Q_PROPERTY(QSharedPointer<QObject> type READ type WRITE setType)
     Q_PROPERTY(QDecDouble price READ price WRITE setPrice)
     Q_PROPERTY(Enums::VatType vat READ vat WRITE setVat)
@@ -25,10 +25,10 @@ class CommodityData : public ShopItem
 public:
     CommodityData(QObject *parent = 0);
 
-    int id() const;
+    int id() override;
     void setId(int id);
 
-    QString name() const;
+    QString name() override;
     void setName(const QString &name);
 
     QString shortName() const;
@@ -60,6 +60,12 @@ private:
     int m_price;
     Enums::VatType m_vat;
     int m_count;
+
+    // IShopItem interface
+public:
+    QDecDouble unitPrice() override;
+    Enums::VatType vatType() override;
+    QString pluginId() override;
 };
 
 #endif // COMMODITYDATA_H
diff --git a/shop/data/voucheritem.cpp b/shop/data/voucheritem.cpp
index 3d25f3f..cd7132f 100644
--- a/shop/data/voucheritem.cpp
+++ b/shop/data/voucheritem.cpp
@@ -39,8 +39,9 @@ int VoucherItem::count() const
 
 void VoucherItem::setCount(int count)
 {
+    int oldCount = m_count;
     m_count = count;
-    emit countChanged();
+    emit countChanged(oldCount);
 }
 
 QDecDouble VoucherItem::unitPrice() const
diff --git a/shop/data/voucheritem.h b/shop/data/voucheritem.h
index 02ee8de..d41e77f 100644
--- a/shop/data/voucheritem.h
+++ b/shop/data/voucheritem.h
@@ -63,7 +63,7 @@ public:
     void setVoucher(const QWeakPointer<Voucher> &voucher);
 
 signals:
-    void countChanged();
+    void countChanged(int oldCount);
 
 private:
     friend class odb::access;
diff --git a/shop/isellableservice.h b/shop/isellableservice.h
index 8ce1372..dc778c0 100644
--- a/shop/isellableservice.h
+++ b/shop/isellableservice.h
@@ -12,6 +12,7 @@ public:
     ISellableService();
 
     virtual QList<QSharedPointer<ShopItem> > shopItems() = 0;
+    virtual void addedToVoucher(int itemId, int countAdded) = 0;
 };
 
 #endif // ISELLABLESERVICE_H
diff --git a/shop/shopform.cpp b/shop/shopform.cpp
index 3b1cfc5..f78c431 100644
--- a/shop/shopform.cpp
+++ b/shop/shopform.cpp
@@ -8,6 +8,7 @@
 #include "receiptgenerator.h"
 #include "paydialog.h"
 #include "paydvouchersdialog.h"
+#include "isellableservice.h"
 #include <QList>
 #include <QSharedPointer>
 #include "shop-odb.hxx"
@@ -60,6 +61,10 @@ void ShopForm::loadLast()
     {
         m_commodityModel = new AutoTableModel<ShopItem>(this);
         ui->commodityTable->setModel(m_commodityModel);
+
+        connect(ui->commodityTable->selectionModel(), &QItemSelectionModel::currentRowChanged, [this](const QModelIndex &current, const QModelIndex &){
+            ui->btnAddItem->setEnabled(current.isValid());
+        });
     }
 
     m_commodityModel->setData(srv.allSellableItems());
@@ -93,11 +98,7 @@ void ShopForm::on_directSale_clicked()
     form->setAttribute(Qt::WA_DeleteOnClose);
 
     connect(form, &QDialog::accepted, [this, form](){
-        ShopService srv;
-        srv.addShopItem(m_voucher, form->shopItem(), ((DirectSaleItem*)form->shopItem().data())->count());
-        this->m_itemsModel->addRow(m_voucher->items()[m_voucher->items().count() - 1]);
-        connect(m_voucher->items()[m_voucher->items().count() - 1].data(), SIGNAL(countChanged()), this, SLOT(onCountChanged()));
-        onCountChanged();
+        addItem(form->shopItem(), ((DirectSaleItem*)form->shopItem().data())->count());
     });
 
     form->show();
@@ -132,7 +133,7 @@ void ShopForm::on_loadButton_clicked()
     form->show();
 }
 
-void ShopForm::onCountChanged()
+void ShopForm::onCountChanged(int oldCount)
 {
     VoucherItem *item = qobject_cast<VoucherItem*>(sender());
     if (item != NULL && item->count() == 0)
@@ -162,6 +163,12 @@ void ShopForm::onCountChanged()
     {
         srv.updateVoucher(m_voucher);
     }
+
+    if (item != NULL)
+    {
+        int countAdded = item->count() - oldCount;
+        srv.updateRelatedItem(item, countAdded);
+    }
 }
 
 void ShopForm::createVoucher()
@@ -224,7 +231,7 @@ void ShopForm::changeReceipt()
 void ShopForm::connectItemSignals()
 {
     foreach (QSharedPointer<VoucherItem> item, m_voucher->items()) {
-        connect(item.data(), SIGNAL(countChanged()), this, SLOT(onCountChanged()));
+        connect(item.data(), SIGNAL(countChanged(int)), this, SLOT(onCountChanged(int)));
     }
 }
 
@@ -238,6 +245,15 @@ void ShopForm::createEmptyVoucher()
     ui->payButton->setEnabled(false);
 }
 
+void ShopForm::addItem(QSharedPointer<IShopItem> item, int count)
+{
+    ShopService srv;
+    srv.addShopItem(m_voucher, item, count);
+    this->m_itemsModel->addRow(m_voucher->items()[m_voucher->items().count() - 1]);
+    connect(m_voucher->items()[m_voucher->items().count() - 1].data(), SIGNAL(countChanged(int)), this, SLOT(onCountChanged(int)));
+    onCountChanged(0);
+}
+
 void ShopForm::on_receiptCombo_currentIndexChanged(int)
 {
     if (!m_voucher.isNull() && m_voucher->items().isEmpty())
@@ -286,3 +302,14 @@ void ShopForm::on_showPaiedButton_clicked()
     dialog->setAttribute(Qt::WA_DeleteOnClose);
     dialog->show();
 }
+
+void ShopForm::on_btnAddItem_clicked()
+{
+    if (m_voucher.isNull())
+    {
+        createVoucher();
+    }
+
+    ShopItemPtr item = m_commodityModel->itemFromIndex(ui->commodityTable->currentIndex());
+    addItem(item, ui->spnCount->value());
+}
diff --git a/shop/shopform.h b/shop/shopform.h
index bb26645..301823b 100644
--- a/shop/shopform.h
+++ b/shop/shopform.h
@@ -7,6 +7,7 @@
 #include <autotablemodel.h>
 
 class ShopItem;
+class IShopItem;
 
 namespace Ui {
 class ShopForm;
@@ -31,7 +32,7 @@ private slots:
 
     void on_loadButton_clicked();
 
-    void onCountChanged();
+    void onCountChanged(int oldCount);
 
     void on_receiptCombo_currentIndexChanged(int index);
 
@@ -39,6 +40,8 @@ private slots:
 
     void on_showPaiedButton_clicked();
 
+    void on_btnAddItem_clicked();
+
 private:
     Ui::ShopForm *ui;
     QSharedPointer<Voucher> m_voucher;
@@ -50,6 +53,7 @@ private:
     void changeReceipt();
     void connectItemSignals();
     void createEmptyVoucher();
+    void addItem(QSharedPointer<IShopItem> item, int count);
 };
 
 #endif // SHOPFORM_H
diff --git a/shop/shopform.ui b/shop/shopform.ui
index 56dceaf..93f4c36 100644
--- a/shop/shopform.ui
+++ b/shop/shopform.ui
@@ -55,7 +55,14 @@
           <widget class="QLineEdit" name="commoditySearch"/>
          </item>
          <item>
-          <widget class="QTableView" name="commodityTable"/>
+          <widget class="QTableView" name="commodityTable">
+           <property name="selectionMode">
+            <enum>QAbstractItemView::SingleSelection</enum>
+           </property>
+           <property name="selectionBehavior">
+            <enum>QAbstractItemView::SelectRows</enum>
+           </property>
+          </widget>
          </item>
          <item>
           <widget class="QWidget" name="widget_8" native="true">
@@ -68,7 +75,7 @@
              </widget>
             </item>
             <item>
-             <widget class="QSpinBox" name="spinBox">
+             <widget class="QSpinBox" name="spnCount">
               <property name="wrapping">
                <bool>false</bool>
               </property>
@@ -78,13 +85,23 @@
               <property name="showGroupSeparator" stdset="0">
                <bool>false</bool>
               </property>
+              <property name="minimum">
+               <number>1</number>
+              </property>
              </widget>
             </item>
             <item>
-             <widget class="QPushButton" name="pushButton">
+             <widget class="QPushButton" name="btnAddItem">
+              <property name="enabled">
+               <bool>false</bool>
+              </property>
               <property name="text">
                <string>Add Item</string>
               </property>
+              <property name="icon">
+               <iconset resource="../core/rc.qrc">
+                <normaloff>:/icons/new.svg</normaloff>:/icons/new.svg</iconset>
+              </property>
              </widget>
             </item>
            </layout>
@@ -386,8 +403,8 @@
   </layout>
  </widget>
  <resources>
-  <include location="shoprc.qrc"/>
   <include location="../core/rc.qrc"/>
+  <include location="shoprc.qrc"/>
  </resources>
  <connections/>
 </ui>
diff --git a/shop/shopitem.h b/shop/shopitem.h
index d23eac1..0f03f44 100644
--- a/shop/shopitem.h
+++ b/shop/shopitem.h
@@ -10,6 +10,7 @@ class SHOPSHARED_EXPORT ShopItem : public QObject, public IShopItem
 {
     Q_OBJECT
 
+    Q_PROPERTY(QString code READ code)
     Q_PROPERTY(QString name READ name)
     Q_PROPERTY(QDecDouble unitPrice READ unitPrice)
     Q_PROPERTY(Enums::VatType vatType READ vatType)
@@ -24,10 +25,13 @@ public slots:
     // IShopItem interface
 public:
     virtual int id() override { return 0; }
+    virtual QString code() { return ""; }
     virtual QString name() override { return ""; }
     virtual QDecDouble unitPrice() override { return QDecDouble(); }
     virtual Enums::VatType vatType() override { return Enums::NONE; }
     virtual QString pluginId() override { return ""; }
 };
 
+typedef QSharedPointer<ShopItem> ShopItemPtr;
+
 #endif // SHOPITEM_H
diff --git a/shop/shopservice.cpp b/shop/shopservice.cpp
index 6220085..5692915 100644
--- a/shop/shopservice.cpp
+++ b/shop/shopservice.cpp
@@ -25,6 +25,8 @@ void ShopService::addShopItem(QSharedPointer<Voucher> voucher, QSharedPointer<IS
     vItem->setVatType(item->vatType());
 
     voucher->addItem(vItem);
+
+    updateRelatedItem(vItem.data(), count);
 }
 
 void ShopService::calculate(QSharedPointer<Voucher> voucher)
@@ -106,6 +108,18 @@ void ShopService::pay(QSharedPointer<Voucher> voucher)
     tx.commit();
 }
 
+void ShopService::updateRelatedItem(VoucherItem* item, int countAdded)
+{
+    IPlugin *plugin = Context::instance().plugin(item->itemPlugin());
+    IService *srv = (plugin != NULL ? plugin->service<IService>() : NULL);
+    ISellableService *selSrv = dynamic_cast<ISellableService*>(srv);
+
+    if (selSrv != NULL)
+    {
+        selSrv->addedToVoucher(item->refId(), countAdded);
+    }
+}
+
 QList<QSharedPointer<Voucher> > ShopService::savedVouchers()
 {
     return all(QString("status = %1").arg(QString::number(Voucher::NOT_PAID)));
diff --git a/shop/shopservice.h b/shop/shopservice.h
index 87eae88..f941ca3 100644
--- a/shop/shopservice.h
+++ b/shop/shopservice.h
@@ -19,6 +19,7 @@ public:
     void calculateItem(QSharedPointer<VoucherItem> item);
     void loadItems(QSharedPointer<Voucher> voucher);
     void pay(QSharedPointer<Voucher> voucher);
+    void updateRelatedItem(VoucherItem* item, int countAdded);
     QList<QSharedPointer<Voucher> > savedVouchers();
     QList<QSharedPointer<Voucher> > tempVouchers();
     QList<QSharedPointer<Voucher> > paiedVouchers();