diff --git a/app/code/Magento/BundleImportExport/Model/Export/RowCustomizer.php b/app/code/Magento/BundleImportExport/Model/Export/RowCustomizer.php
index 24ccbbee23649908163750b13795d9302ead3b1a..840accf098c4d0d77723d38866d115e776ec4d65 100644
--- a/app/code/Magento/BundleImportExport/Model/Export/RowCustomizer.php
+++ b/app/code/Magento/BundleImportExport/Model/Export/RowCustomizer.php
@@ -294,7 +294,7 @@ class RowCustomizer implements RowCustomizerInterface
      * Retrieve option value of bundle product
      *
      * @param \Magento\Bundle\Model\Option $option
-     * @param array $optionTitles
+     * @param string[] $optionTitles
      * @return string
      */
     protected function getFormattedOptionValues($option, $optionTitles = [])
@@ -464,7 +464,7 @@ class RowCustomizer implements RowCustomizerInterface
      * @return \Magento\Bundle\Model\ResourceModel\Option\Collection
      */
     private function getProductOptionCollections(
-        $product,
+        \Magento\Catalog\Model\Product $product,
         $storeId = \Magento\Store\Model\Store::DEFAULT_STORE_ID
     ): \Magento\Bundle\Model\ResourceModel\Option\Collection {
         $productSku = $product->getSku();
diff --git a/app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle.php b/app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle.php
index b7f70d18f5c85209da0f64579778774b54e2b9b8..93d41c067b22991a598436710fa50afe62c78dae 100644
--- a/app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle.php
+++ b/app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle.php
@@ -726,10 +726,10 @@ class Bundle extends \Magento\CatalogImportExport\Model\Import\Product\Type\Abst
     /**
      * Get store id by store code.
      *
-     * @param string|null $storeCode
+     * @param string $storeCode
      * @return int
      */
-    private function getStoreIdByCode($storeCode): int
+    private function getStoreIdByCode(string $storeCode): int
     {
         if (!isset($this->storeIdToCode[$storeCode])) {
             /** @var $store \Magento\Store\Model\Store */
diff --git a/app/code/Magento/CatalogImportExport/Model/Export/Product.php b/app/code/Magento/CatalogImportExport/Model/Export/Product.php
index af14ef0bf6e8e2bf98fefd3443750f50144514b8..6a14eb8b7a817e393550eb6af82480fa785f9c8e 100644
--- a/app/code/Magento/CatalogImportExport/Model/Export/Product.php
+++ b/app/code/Magento/CatalogImportExport/Model/Export/Product.php
@@ -1385,7 +1385,7 @@ class Product extends \Magento\ImportExport\Model\Export\Entity\AbstractEntity
                 if (Store::DEFAULT_STORE_ID === $storeId) {
                     $row['required'] = $option['is_require'];
                     $row['price'] = $option['price'];
-                    $row['price_type'] = ($option['price_type'] == 'percent') ? $option['price_type'] : 'fixed';
+                    $row['price_type'] = ($option['price_type'] === 'percent') ? 'percent' : 'fixed';
                     $row['sku'] = $option['sku'];
                     if ($option['max_characters']) {
                         $row['max_characters'] = $option['max_characters'];
@@ -1406,9 +1406,8 @@ class Product extends \Magento\ImportExport\Model\Export\Entity\AbstractEntity
                         $row['option_title'] = $value['title'];
                         if (Store::DEFAULT_STORE_ID === $storeId) {
                             $row['option_title'] = $value['title'];
-                            $valuePriceType = ($value['price_type'] == 'percent') ? $value['price_type'] : 'fixed';
                             $row['price'] = $value['price'];
-                            $row['price_type'] = $valuePriceType;
+                            $row['price_type'] = ($value['price_type'] === 'percent') ? 'percent' : 'fixed';
                             $row['sku'] = $value['sku'];
                         }
                         $customOptionsData[$productId][$storeId][] = $this->optionRowToCellString($row);