diff --git a/retailcrm/lib/RetailcrmCatalog.php b/retailcrm/lib/RetailcrmCatalog.php
index 3656a61..f812fb6 100644
--- a/retailcrm/lib/RetailcrmCatalog.php
+++ b/retailcrm/lib/RetailcrmCatalog.php
@@ -221,7 +221,11 @@ class RetailcrmCatalog
 
                     $offerCombination = new Combination($offer['id_product_attribute']);
 
-                    $offerPrice = $offerCombination->price + $price;
+                    $offerCombinationPrice = !empty($product['rate'])
+                        ? round($offerCombination->price, 2) + (round($offerCombination->price, 2) * $product['rate'] / 100)
+                        : round($offerCombination->price, 2);
+
+                    $offerPrice = round($offerCombinationPrice, 2) + $price;
                     $offerPrice = $offerPrice > 0 ? $offerPrice : $price;
 
                     if ($offerCombination->wholesale_price > 0) {
diff --git a/retailcrm/lib/RetailcrmCli.php b/retailcrm/lib/RetailcrmCli.php
index 5e4b186..292b4c8 100644
--- a/retailcrm/lib/RetailcrmCli.php
+++ b/retailcrm/lib/RetailcrmCli.php
@@ -156,7 +156,12 @@ class RetailcrmCli
                 $result ? 'true' : 'false'
             ));
         } catch (\Exception $exception) {
-            $this->printStack($exception);
+            if ($exception instanceof RetailcrmJobManagerException && !empty($exception->getPrevious())) {
+                $this->printStack($exception->getPrevious());
+            } else {
+                $this->printStack($exception);
+            }
+
             self::clearCurrentJob($jobName);
         } finally {
             if (isset($result) && $result) {
@@ -169,10 +174,11 @@ class RetailcrmCli
      * Prints error details
      *
      * @param \Exception $exception
+     * @param string     $header
      */
-    private function printStack($exception)
+    private function printStack($exception, $header = 'Error while executing a job: ')
     {
-        RetailcrmLogger::output(sprintf('Error while executing a job: %s', $exception->getMessage()));
+        RetailcrmLogger::output(sprintf('%s%s', $header, $exception->getMessage()));
         RetailcrmLogger::output(sprintf('%s:%d', $exception->getFile(), $exception->getLine()));
         RetailcrmLogger::output();
         RetailcrmLogger::output($exception->getTraceAsString());
diff --git a/retailcrm/lib/RetailcrmJobManager.php b/retailcrm/lib/RetailcrmJobManager.php
index 3c82a1d..7aea05b 100644
--- a/retailcrm/lib/RetailcrmJobManager.php
+++ b/retailcrm/lib/RetailcrmJobManager.php
@@ -172,12 +172,22 @@ class RetailcrmJobManager
                     $lastRuns[$job] = new \DateTime('now');
                 }
             } catch (\Exception $exception) {
-                static::handleError(
-                    $exception->getFile(),
-                    $exception->getMessage(),
-                    $exception->getTraceAsString(),
-                    $job
-                );
+                if ($exception instanceof RetailcrmJobManagerException && !empty($exception->getPrevious())) {
+                    static::handleError(
+                        $exception->getPrevious()->getFile(),
+                        $exception->getPrevious()->getMessage(),
+                        $exception->getPrevious()->getTraceAsString(),
+                        $job
+                    );
+                } else {
+                    static::handleError(
+                        $exception->getFile(),
+                        $exception->getMessage(),
+                        $exception->getTraceAsString(),
+                        $job
+                    );
+                }
+
                 self::clearCurrentJob($job);
             } finally {
                 if (isset($result) && $result) {
@@ -286,7 +296,7 @@ class RetailcrmJobManager
         } catch (\RetailcrmJobManagerException $exception) {
             throw $exception;
         } catch (\Exception $exception) {
-            throw new RetailcrmJobManagerException($exception->getMessage(), $jobFile);
+            throw new RetailcrmJobManagerException($exception->getMessage(), $jobFile, array(), 0, $exception);
         }
     }
 
@@ -444,7 +454,10 @@ class RetailcrmJobManager
 
         RetailcrmLogger::writeNoCaller(sprintf('%s: %s (%s)', $file, $msg, implode(', ', $data)));
         RetailcrmLogger::writeNoCaller($trace);
-        RetailcrmTools::http_response_code(500);
+
+        if (PHP_SAPI != 'cli' && !headers_sent()) {
+            RetailcrmTools::http_response_code(500);
+        }
     }
 
     /**
diff --git a/tests/RetailcrmCatalogTest.php b/tests/RetailcrmCatalogTest.php
index 8773fd6..3ceb442 100644
--- a/tests/RetailcrmCatalogTest.php
+++ b/tests/RetailcrmCatalogTest.php
@@ -42,6 +42,51 @@ class RetailcrmCatalogTest extends RetailcrmTestCase
         }
     }
 
+    public function testIsPricesWithTax()
+    {
+        $products = $this->data[1];
+        $productsPresta = array();
+        $productsPrestaList = Product::getProducts(
+            (int) Configuration::get('PS_LANG_DEFAULT'),
+            0,
+            0,
+            'name',
+            'asc'
+        );
+
+        foreach ($productsPrestaList as $productData) {
+            $productsPresta[$productData['id_product']] = $productData;
+        }
+
+        unset($productsPrestaList);
+
+        foreach ($products as $product) {
+            $this->assertArrayHasKey('productId', $product);
+            $this->assertArrayHasKey('price', $product);
+
+            $prestaProduct = $productsPresta[$product['productId']];
+            $price = !empty($prestaProduct['rate'])
+                ? round($prestaProduct['price'], 2) + (round($prestaProduct['price'], 2) * $prestaProduct['rate'] / 100)
+                : round($prestaProduct['price'], 2);
+
+            if (strpos($product['id'], '#') !== false) {
+                $offerId = explode('#', $product['id']);
+                $offerId = $offerId[1];
+                $offerCombination = new Combination($offerId);
+
+                $offerCombinationPrice = !empty($prestaProduct['rate'])
+                    ? round($offerCombination->price, 2) + (round($offerCombination->price, 2) * $prestaProduct['rate'] / 100)
+                    : round($offerCombination->price, 2);
+                $offerPrice = round($offerCombinationPrice, 2) + $price;
+                $offerPrice = $offerPrice > 0 ? $offerPrice : $price;
+
+                $this->assertEquals(round($offerPrice, 2), round($product['price'], 2));
+            } else {
+                $this->assertEquals(round($price, 2), round($product['price'], 2));
+            }
+        }
+    }
+
     public function testIcmlGenerate()
     {
         $icml = new RetailcrmIcml(Configuration::get('PS_SHOP_NAME'), _PS_ROOT_DIR_ . '/retailcrm.xml');