diff --git a/src/core/excelreader.cpp b/src/core/excelreader.cpp
index 7225c78..f39333c 100644
--- a/src/core/excelreader.cpp
+++ b/src/core/excelreader.cpp
@@ -18,14 +18,13 @@ void ExcelReader::readSellersFromFile(const std::string& filename, Marketplace*
 
     int rowCount{};
     for (const auto& row : ws.rows(false)) {
-        // auto test = row[0].value<int>();
         if (rowCount < START_ROW) {
             ++rowCount;
             continue;
         } else if (rowCount > END_ROW) {
             break;
         }
-        if(row[2].value<std::string>().empty() && row[3].value<std::string>().empty()) {
+        if (row[2].value<std::string>().empty() && row[3].value<std::string>().empty()) {
             ++rowCount;
             continue;
         }
diff --git a/src/core/jsonutil.cpp b/src/core/jsonutil.cpp
index 6dc855c..5acadee 100644
--- a/src/core/jsonutil.cpp
+++ b/src/core/jsonutil.cpp
@@ -31,17 +31,16 @@ void JsonUtil::exportSellers(const std::string& filename, Marketplace* market)
 
 void JsonUtil::importSellers(const std::string& filename, Marketplace* market)
 {
-    for (auto& seller : market->getSellers())
-    {
+    for (auto& seller : market->getSellers()) {
         seller->setState(Seller::State::DELETE);
     }
     market->storeToDb(true);
-    
+
     Json::Value jsonValues;
     std::ifstream file(filename);
     file >> jsonValues;
 
-    for(auto val : jsonValues["sellers"]) {
+    for (auto val : jsonValues["sellers"]) {
         auto seller = std::make_unique<Seller>();
         seller->setUuidFromString(val["uuid"].asString());
         seller->setSellerNo(val["seller_no"].asInt());
@@ -51,4 +50,55 @@ void JsonUtil::importSellers(const std::string& filename, Marketplace* market)
         market->getSellers().push_back(std::move(seller));
     }
     market->storeToDb();
+}
+
+void JsonUtil::exportSales(const std::string& filename, Marketplace* market, int cashPointNo)
+{
+    Json::Value root;
+    std::ofstream file(filename);
+
+    Json::StreamWriterBuilder builder;
+    builder["commentStyle"] = "None";
+    builder["indentation"] = "   ";
+
+    std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+
+    root["source_no"] = cashPointNo;
+
+    for (const auto& sale : market->getSales()) {
+        Json::Value newSale;
+        newSale["uuid"] = sale->getUuidAsString();
+        newSale["timestamp"] = sale->getTimestamp();
+
+        for (const auto& article : sale->getArticles()) {
+            Json::Value newArticle;
+            newArticle["uuid"] = article->getUuidAsString();
+            newArticle["seller_uuid"] = article->getSeller()->getUuidAsString();
+            newArticle["desc"] = article->getDescription();
+            newArticle["price"] = article->getPrice();
+            // newArticle["source_no"] = article->getSourceNo();
+            newArticle["article_no"] = article->getArticleNo();
+
+            newSale["articles"].append(newArticle);
+        }
+
+        root["sales"].append(newSale);
+    }
+
+    writer->write(root, &file);
+}
+
+void JsonUtil::importSales(const std::string& filename, Marketplace* market, int cashPointNo)
+{
+    Json::Value jsonValues;
+    std::ifstream file(filename);
+    file >> jsonValues;
+
+    int source_no = jsonValues["source_no"].asInt();
+    if (source_no == cashPointNo) {
+        throw std::runtime_error("Die Kassen-Nr. der zu imporierenden Daten wird von dieser Kasse "
+                                 "hier bereits verwendet.");
+    }
+
+    // TODO: Import sales
 }
\ No newline at end of file
diff --git a/src/core/jsonutil.h b/src/core/jsonutil.h
index 0e3a03d..1f0335d 100644
--- a/src/core/jsonutil.h
+++ b/src/core/jsonutil.h
@@ -10,6 +10,8 @@ class JsonUtil
   public:
     static void exportSellers(const std::string& filename, Marketplace* market);
     static void importSellers(const std::string& filename, Marketplace* market);
+    static void exportSales(const std::string& filename, Marketplace* market, int cashPointNo);
+    static void importSales(const std::string& filename, Marketplace* market, int cashPointNo);
 };
 
 #endif
\ No newline at end of file
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 5d12161..8447b59 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -12,6 +12,7 @@
 #include <excelreader.h>
 
 #include <regex>
+#include <exception>
 
 #include <QFileDialog>
 #include <QMessageBox>
@@ -68,6 +69,10 @@ MainWindow::MainWindow()
             &MainWindow::onImportSellerJsonActionTriggered);
     connect(ui_.exportSellerJsonAction, &QAction::triggered, this,
             &MainWindow::onExportSellerJsonActionTriggered);
+    connect(ui_.exportSalesJsonAction, &QAction::triggered, this,
+            &MainWindow::onExportSalesJsonActionTriggered);
+    connect(ui_.importSalesJsonAction, &QAction::triggered, this,
+            &MainWindow::onImportSalesJsonActionTriggered);
 }
 
 void MainWindow::onActionEditSellerTriggered()
@@ -276,11 +281,45 @@ void MainWindow::onImportSellerJsonActionTriggered()
     JsonUtil::importSellers(filename.toStdString(), marketplace_.get());
 }
 
-
 void MainWindow::onExportSellerJsonActionTriggered()
 {
     auto filename = QFileDialog::getSaveFileName(this, "Verkäufer exportieren", QString(),
                                                  "JSON Dateien (*.json)");
 
     JsonUtil::exportSellers(filename.toStdString(), marketplace_.get());
-}
\ No newline at end of file
+}
+
+void MainWindow::onExportSalesJsonActionTriggered()
+{
+    QSettings settings;
+
+    auto filename = QFileDialog::getSaveFileName(this, "Umsätze/Transaktionen exportieren",
+                                                 QString(), "JSON Dateien (*.json)");
+    JsonUtil::exportSales(filename.toStdString(), marketplace_.get(),
+                          settings.value("global/cashPointNo").toInt());
+}
+
+void MainWindow::onImportSalesJsonActionTriggered()
+{
+    /* if (!marketplace_->getSales().empty()) {
+        QMessageBox(QMessageBox::Icon::Information, "Import nicht möglich",
+                    "Der Import ist nicht möglich, da schon Verkäufe getätigt wurden.",
+                    QMessageBox::StandardButton::Ok, this)
+            .exec();
+        return;
+    } */
+
+    QSettings settings;
+
+    auto filename = QFileDialog::getOpenFileName(this, "Umsätze/Transaktionen importieren",
+                                                 QString(), "JSON Dateien (*.json)");
+
+    try {
+        JsonUtil::importSales(filename.toStdString(), marketplace_.get(),
+                                settings.value("global/cashPointNo").toInt());
+    } catch (std::runtime_error& err) {
+        QMessageBox(QMessageBox::Icon::Warning, "Import nicht möglich", err.what(), QMessageBox::Ok,
+                    this)
+            .exec();
+    }
+}
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index 77f59c6..f928e6b 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -35,6 +35,8 @@ class MainWindow : public QMainWindow
     void onImportSellerExcelActionTriggered();
     void onImportSellerJsonActionTriggered();
     void onExportSellerJsonActionTriggered();
+    void onExportSalesJsonActionTriggered();
+    void onImportSalesJsonActionTriggered();
     void setSaleModel();
 
     Ui::MainWindow ui_;
diff --git a/src/gui/mainwindow.ui b/src/gui/mainwindow.ui
index f0f54a6..2e7d874 100644
--- a/src/gui/mainwindow.ui
+++ b/src/gui/mainwindow.ui
@@ -421,15 +421,17 @@ drucken</string>
     <addaction name="aboutAction"/>
     <addaction name="aboutQtAction"/>
    </widget>
-   <widget class="QMenu" name="menuExtras">
+   <widget class="QMenu" name="menuSales">
     <property name="title">
-     <string>&amp;Extras</string>
+     <string>&amp;Umsätze</string>
     </property>
     <addaction name="reportAction"/>
+    <addaction name="importSalesJsonAction"/>
+    <addaction name="exportSalesJsonAction"/>
    </widget>
    <addaction name="menu_Datei"/>
    <addaction name="menu_Edit"/>
-   <addaction name="menuExtras"/>
+   <addaction name="menuSales"/>
    <addaction name="menuHilfe"/>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
@@ -482,6 +484,16 @@ drucken</string>
     <string>Aus JSON-Datei</string>
    </property>
   </action>
+  <action name="exportSalesJsonAction">
+   <property name="text">
+    <string>Exportieren (JSON)</string>
+   </property>
+  </action>
+  <action name="importSalesJsonAction">
+   <property name="text">
+    <string>Importieren (JSON)</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>